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FITS 2005 GMC Sierra
Timbren Front Suspension Enhancement System

Timbren Front Suspension Enhancement System

Item # TGMFK25S

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Vehicle Suspension
Confirmed to Fit
2005 GMC Sierra

1500 HD

1500 LD

2500 HD

3500 - Cab and Chassis

3500 - Pickup

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TGMFK25S - Heavy Duty Timbren Front Axle Suspension Enhancement
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  • Timbren
  • Jounce-Style Springs
  • Heavy Duty
  • Front Axle Suspension Enhancement
The best technical support and full vehicle suspension installation instructions. Lowest price Sierra vehicle suspension guarantee and expert service. GMC Sierra, 2005 vehicle suspension by Timbren are available from etrailer.com. For expert service call 800-298-8924 to order your Timbren Front Suspension Enhancement System part number TGMFK25S, or order online at etrailer.com.


  • All Info
  • Reviews (1611)
  • Q & A (29)
  • Videos (1)
  • Photos
  • Why etrailer?

2005 GMC Sierra - Timbren Front Suspension Enhancement System

14,000-lb Capacity. Great for trucks with plows, these front hollow rubber springs help to stabilize and level your GMC Sierra. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use.


Features:

  • Improves suspension and handling
    • Prevents body roll with improved weight distribution
    • Stabilizes the GMC Sierra for better handling of heavy loads
  • Adjusts progressively to the road and the load so you always have a smooth, comfortable ride
    • Provides additional support as needed
      • Allows the spring ample movement while at the same time providing cushioning for light loads
      • Increases stability and great performance while cornering, swerving or hauling large loads
  • Takes the brunt of bumps and rough roads
    • Extends the life of your GMC Sierra's suspension
      • Designed to work with a suspension system that is in good working order
  • Requires no air hoses, compressors or manual adjustments


Specs:

  • Includes 2 Aeon hollow rubber springs, GMC Sierra-specific brackets and hardware for simple installation
    • Replaces axle bump stops on frame
    • No drilling required
  • Capacity: 14,000 lbs
    • Do not exceed the GMC Sierra's weight-carrying capacity
  • Designed to work with a suspension system that is in good working order
  • Limited lifetime warranty - satisfaction guarantee


Reduced axle sag with Timbren suspension enhancement

Just like the rear of your GMC Sierra will sag under the weight of a fully loaded bed, the front of your vehicle will sag when under the burden of heavy equipment such as a snowplow. In this case, the front axle is handling not only the weight of the equipment, but also more of the vehicle's weight. Overall GMC Sierra handling - traction, steering, and braking - is negatively affected. But the resistance from Timbren's Suspension Enhancement System works with your factory suspension to keep your vehicle level and improve your driving experience.


Install diagrams of Timbren hollow rubber springs

The Timbren system comes with custom-fit brackets that are bolted onto each frame rail above your front axle. Hollow rubber springs are bolted to the bottom of the bracket and hang down so that the bottom of each spring touches the axle. Because each spring is making constant contact with the axle, it is always working to cushion and support your factory suspension.


Animation of a standard Timbren rubber spring

Timbren Suspension Enhancement Systems are designed to work progressively. When the hollow rubber springs are compressed, the convoluted design causes them to quickly collapse along the folds. Once the folds are compacted, the stacked barrel shape increases resistance, stiffening the suspension and keeping your GMC Sierra level.


Timbren suspension system works to prevent body roll

Each hollow rubber spring works independently to support the driver's-side or passenger's-side of your GMC Sierra. This is helpful when you swerve or make sharp turns. Each spring is activated when it is needed, so body roll is greatly reduced. The independent action also works well when you're carrying off-center loads.

A snowplow mounted to the front of the truck will require extra suspension support for the front axle.

Timbren's Suspension Enhancement System will help raise the front end of your GMC Sierra when you're using heavy equipment like a snowplow. This ensures that your headlight beams will be pointed in the right direction and tire wear will be reduced. If the plow is off-center or has an extension, the springs will automatically compensate for this as well.

An empty truck on a bumpy road without Timbren

Another great feature of the rubber construction is that the springs absorb most of the road shock, creating a smoother, more stable ride overall. Wear and tear on the factory suspension is also lessened because the rubber springs work to prevent bottoming out on rough roads.


Timbren Suspension Enhancement Compared to the Competition

Timbren's Suspension Enhancement Systems are much easier to install than air springs - there are no air hoses to run, no compressors or gauges to hook up, and no manual adjustments to make. The rubber construction makes Timbren's springs more elastic than similar products constructed of microcellular urethane. More elasticity allows for a more comfortable ride because the rubber has more travel.



GMFK25S - Front Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren



TGMFK25S Installation InstructionsInstallation Details TGMFK25S Installation instructions

Video of Timbren Front Suspension Enhancement System


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Timbren Vehicle Suspension - Front Axle Suspension Enhancement - TGMFK25S Review

Today we're going to review part number TGMFK25S. This is the Timbren Front Suspension Enhancement System. This is a custom fit part number, this is designed to fit the Chevrolet and GMC vehicles starting in 1996. What I would recommend since there's many vehicles it will fit on, I would recommend to go to our website and on the Use Our Fit guide and put your year and model vehicle and that will show you if this part will work for your application. This kit will improve your suspension and handling, prevents body roll with improved weight distribution. It does stabilize the vehicle for better handling of heavy loads. It does adjust progressively to road and the load so you always have a smooth comfortable ride and it does provide additional support as needed.

It does allow the spring ample movement while at the same time providing cushioning for light loads. It does increase the stability and gives you great performance while cornering, swerving or hauling large loads. This does take the brunt of the bumps in the rough loads and it does extend the life of your vehicle's suspension. You do have to make sure, though, it is designed to work with a suspension system that is in good working order and this system does not require any air hoses, compressors or manual adjustments. This part includes everything shown here on the table. It includes these two Aeon hollow rubber springs. It includes these specific brackets and the hardware for simple installation.

When you do install these, it comes with a nice set of instructions that are pretty detailed. These will replace the axle bump stops on your frame, there's no drilling required. The capacity on these is 14,000 pounds but you do need to remember you do not exceed the vehicle's weight carrying capacity. Again, as I mentioned earlier, these are designed to work with a suspension system that is in good working order. This does come with a limited lifetime warranty. That should do it for the review of part number TGMFK25S.

These are the Timbren Front Suspension Enhancement System. .


Customer Reviews

Timbren Front Suspension Enhancement System - TGMFK25S

Average Customer Rating:  4.7 out of 5 stars   (1611 Customer Reviews)

14,000-lb Capacity. Great for trucks with plows, these front hollow rubber springs help to stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use.

- TGMFK25S
by:
2003 Chevrolet Silverado

Only reason I didn't give it a five star is that it is to soon. 333658



- TGMFK25S
by:
1999 Chevrolet Silverado

this is the 3rd replacement of bump stops for my 99 chevy 3/4 HD 4x4. Two were OEM , and one an after market ( lasted a week ! ). I am impressed that the Timbren bump stops are well made and were a direct fit. The truck sits about an inch higher in the front end and best of all the ride is smoother . the truck also has new up graded shocks and the over all condition of the suspension is very sound. the shocks were installed prior to these new bump stops. I would give 5 stars however I am waiting this out to see what the Timbren bump stops are capable of in a year from know. my truck spends most of its time on road not off road . 254821


Comments

I would buy again . these are worth 5 stars.

Gene - 06/01/2017

24483

- TGMFK25S
by:

I ordered timbrens for the front and rear of my chevy 2500. I have a 2000 lb truck camper and I wanted something to help carry the load a little better. I had no idea that my front bump stops had worn away to almost nothing until I installed these. They have worn well and performed well so far. 628835



- TGMFK25S
by:

Little bit rougher ride but worth it in Plow holding capability when traveling. It's nice to not have the front end squatting so much. Excellent product will definitely be purchasing again when I get a new truck. 592581



- TGMFK25S
by:

I am impressed with the timkens. Got a 2009 GMC 2500 hd and Western 8.5' v plow. Nose dive was an understatement before. However I put a 2" leveling kit and installed the timkens at the same time. One of them made my truck ride horrible. Probably the leveling kit from the torsion bars being turned in. I do notice tho that empty going over a jarring bump you can feel the timkens hitting hard. But with a plow on the truck it is the way to go. After this winter I'm gonna take them off and put stok back on for the summer. It's one bolt to replace them install was a piece of cake. 592401



- TGMFK25S
by:

Installed this on my 2005 Silverado 2500HD with the 8.1l engine. Easy 1.5 hour install with hand tools. Raised front of truck about 1" with constant contact with rubber. I'm installing a Boss V Snow Plow and a Truck bed Camper ( for Summer) and needed the extra weight capacity without the suspension sag. Ride quality degraded some, but is not objectionable. Ride is OK for a truck. This is a better solution than changing to stiffer torsion bars or cranking up the stock bars for my application. 589250



- TGMFK25S
by:

They fit well, no notable change in ride quality unloaded. Im happy with them so far. 463533



- TGMFK25S
by:
Chevrolet Silverado 2500

Easy to install, keeps the front end up with the snow plow on our 2500 Silverado 456597



- TGMFK25S
by:

Works great on my 2005 2500hd towing my 42 ft fifth wheel. Have them on the back also. No suspension sag and no sway,very impressed. Fit was correct easy install. Just as good as air bags. 455005



- TGMFK25S
by:

Works great on my 2005 2500hd towing my 42 ft fifth wheel. Have them on the back also. No suspension sag and no sway,very impressed. Fit was correct easy install. Just as good as air bags. 454652



- TGMFK25S
by:
2004 Chevrolet Silverado

Easy to install 396033



- TGMFK25S
by:
2005 GMC Sierra

Love them the are great we use them on our plow trucks they handle the load very well 322538



- TGMFK25S
by:
2006 GMC Sierra

Highly recommend spending the money. My last pickup I bought Sumo Spring rubber stops and they seemed squishy to me, where these are hard and hold up very well. Holds my Boss V-XT 8'2" up where it needs to be. Don't go cheap! You'll regret it! 319272



- TGMFK25S
by:
2003 Chevrolet Silverado

My 03' Chevy Silverado really benefited from the installation of the Timbren bushings. Shipping was fast the instructions from E-trailer were very helpful and made it easy to DIY. The front end of the truck seemed to be sagging especially when the plow was raised even with 600 lbs of ballast. The front end was raised up about 3/4" after the install and the ride quality is greatly improved overall. I cannot hardly wait to try them with the plow. I would highly recommend Timbren bushings to anybody with a higher mileage vehicle like mine 160,000. 302726


Comments

These will be going on every truck I buy from now on.

P. M - 10/05/2017

28735

- TGMFK25S
by:
2006 GMC Sierra

Works very well in the front of the truck. Made the truck sit 1" higher. Supports the snow plow well. 277819



- TGMFK25S
by:
Chevy 2500HD Silverado

Timbren SES heavy duty jounce bumpers dramatically improved the ride of my Chevy 2500HD and it drops only a very small amount when I hoist the plow. Less than 1/2" dropbin ride height with the plow raised. Yet the riee is not harsh. Excellent product, wish I knew about it years ago. 165956



- TGMFK25S
by:

should have bought this a long time ago really help me out.works great 165401



- TGMFK25S
by:

I like that when I put my plow on the truck the timbren with stands the load and handles great thanks 99190



- TDR2500D
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


These do really well for supporting a full load or trailer attached. But if unloaded the will create whiplash if you go over a speed bump or anything that creates the axle to spring up and hit them. 611025



- TDR3500CA
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Received my Timbrens very quickly, very well packaged. Installed them is less than 30 minutes. Have yet to hook my rv to the truck, but can see these are going to be really helpful. About 1" to my axle where my OEM bump stops were a good 7" As always etrailer rocks!! Look forward to dealing with these folks when the need arises again. 484817


Comments

Couldnt be happier George. I brag about them to others all the time.

Michael - 03/14/2019

50525
Comments

Still loving my Timbrens!

Michael - 03/19/2019

50733

- TFR150D
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


The Timbren rear suspension enhancement system works fine. The RV trailer sits level and tows great. 563471



- TDR1500DQ
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


These "enhanced" bump-stops have definitely improved the ride quality of my 2013 Ram 1500 quad cab when pulling our 7500 lb. 29 foot travel trailer. The trailer probably has 500+ pounds of food, clothes, kids toys, etc inside as well. The truck bed probably has another 800'ish pounds of equipment in it that compresses the suspension before I even hook the trailer up. With the stock stops the rear suspension hardly moved. After adding the new stops, the rear suspension had travel again and the steering felt less twitchy. Unloaded truck will hit the new stops only if I hit a pretty harsh bump but it's only noticeable if you're paying attention to it. With a loaded bed (no trailer) hitting the stops is more noticeable but you still need to hit a decent bump for them to touch. They are very easy to install. Take the time to read the instructions and watch the installation video before you pay someone $50-$75 for a 15-20 minute job. I would buy them again. 482362


Comments

The bump-stops have been excellent. Absolutely worth the money.

John - 03/11/2019

50385

- TFR250SDJ
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


This product seems as described in etrailer catalog and by salesperson. Very easy to install, both sides and clean up 30 minutes (actual install time was about 15-20 minutes). My truck has 100 gal fuel cell and tool box that is pretty full, so I generally have an extra 1200 lbs in bed of truck full time. Looking at truck it sits level instead of rear sitting up a little, not a big deal except headlights aim a little higher and when pulling trailer with skid steer or mini, truck sags an amount that looks overloaded. After installed truck bed height looks close to an unloaded truck. With full fuel cell the truck rests on the Timbren Suspension Enhancement System, I was pleasantly pleased with the ride and look of the truck. The only minor difference is when truck comes to complete stop, there is a slight "jiggle" in truck. Very minor but it is noticeable. I would definitely recommend and purchase again. I can't wait to see how system performs with loaded trailer hooked up. 594996



- TFRTT1504E
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Great Product. Easy install 399499



- TDR2500D
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Took longer to gather up the tools needed, than what it took to install them. Shipping was quick. 456850


Comments

After a year still going strong. I have pulled the 5th wheel about 4K miles with them and no problems.

Bill - 12/03/2018

46355

- TFR250SDJ
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


These things work great. You never have to worry about air leaks or the air pressure like you do when you have bags. 601205



- TDR3500CA
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


This product solved my problem and performed as expected. I tow a 5th wheel RV that weighs around 18,000 LBS. 480684



- TDR2500D
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Got 2 replacement keys for spares. They both worked well. Wished they carried the Led type. Easy ordering, just ensure you order the same number as on the key you have. Embossed on the top of the key just below the purple part. 482736



- THROD2
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I installed these on my 2003 Honda Odyssey that I tow a small pop up trailer with. It really improved the road feel and the occasional bottoming out of my trailer hitch mount. The installation was fairly easy thanks to the video tutorial and the product fit perfect. I highly recommend it! 600879



- TFR1504E
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Bought these to help with body sway while pulling a 22 ft camper. They really helped and were easy to install. 568570



- TFR1504E
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Night and day difference while towing. This is one of the best additions to my truck. My camper is around 7k pounds. My back end doesn't sag as much and doesn't bounce as ki when towing. Not noticeable when unloaded. I recommend this to everyone e who tows. 613728



- TFR350SDF
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Awesome fantastic service 501012



- TDR2500D
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


easy to install. gives the truck a nice stable ride when pulling 5 ton fifth wheel and doesn't effect ride hen unloaded 519541



- TFR1504E
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Very happy with these products. Super easy to install. 610949



- TGMRH2
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Fit like a glove. Very good rear support 576063



- TDR1500DS
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Great product. 597716



- TGMRTT15S
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Good product, good quality... 445617



- TDR1500DS
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Doesn't get any easier for an install. A jack, some soapy water and a couple pieces of 2x4. In about 5 minutes you're done. Took out almost all sag when I dropped my travel trailer on the ball. Great addition to the suspension. 488109



- TGMRG25C
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Went well. Added good level support after installation. One note. You have to check to make sure that the boots go in straight . Mine on the Alvalanche wanted to go in at an angle. Product does work good. 141079



- TGMRCK15S
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Great product, quick install. Fast delivery! Very pleased with product. Installed on 2007 Chevy Silverado 1500(new body style). Used Firestone air bags on last truck and always had to add air. timbrens are ready for work everyday without maintenance. 178862



- TFR250SDJ
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


You guys are great to work with. Thanks again 573793



- TDDRDURA
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I finally had a chance to try these out and they work great. Granted, I do have what they market an ultra-light travel trailer, but for my configuration of my 2007 Dodge Durango (4.7L), this trailer totals out about 75% of my towing capacity. That being said, this vehicle has an abnormally smooth ride for it's size. Because of this, the weight at the hitch creates a slight sag in the rear when weighted over 400 lbs. It also created some suspension characteristics I didn't like, like the slow bounce over undulations. I was advised my shocks were in perfect condition and utilizing stiffer shocks would not prevent the sag and would make the overall ride too tight for me. This was the reason for looking into this option. Installation was as simple as it gets (pull off the old and put on the new). The only tools (if you want to call it that) are possibly a couple of 2x4 blocks (of course you're going to need a jack to jack up your vehicle). 4 inches total was needed to properly seat them. It took a total of 30 minutes, but 20 minutes was me pulling out my jack and jack stands, finding blocks, and taking my sweet time. My Durango rode as level as expected after installation. Photos would not show anything noticeable without actually measuring it (about 450 lbs on the tongue with my particular trailer - see photos). I also didn't have to adjust my mirrors, which was inherent in the slight sag I had before. It took bumps well and the ride was not as bouncy as before, more firm and controlled. The ride without the trailer is noticeably firmer, and with little bumps you can tell they're making contact. Mostly noticeable over speed bumps where my Durango would normally float over them due to the long travel. My Durango inherently didn't ride like a truck or large SUV, more like a sedan. Now, it "sorta" rides more like a truck. Not a deal breaker, but if you like your truck to keep riding smooth, these might not be for you. Pros: Works as advertised. Easy installation. Keeps your vehicle level. Firmer more controlled ride. Removed annoying bounces. Great quality build. Cons: With the clearance from your axel to your bump stop now ~1.5 inches, bumps will be felt if making contact (-1 star for me, but if this is not an issue for your application, you should add the star back). Overall, I would highly recommend this product, even for a smaller SUV like my Dodge Durango. That being said, it won't have the same smooth ride with the long travel as before, but definitely worth it if you're towing with the same type of vehicle. 489147


Comments

After a year of use, the product continues to perform as expected. I have specifically put about 6-8 trips with this product and I have not had any issues. This included many miles on the highways and some trail driving. The product continues to perform well, assisting on absorbing undulations and helps keep the vehicle stable and level. I did not mention this before, but its important to know that this product is only a supplement to an already stable suspension and correctly-weighted setup. If properly used, this product will enhance your driving experience, but it will not fix any overweight or setup issues. I still highly recommend this product.

Arnell - 03/25/2019

50969

- TTORSEQ
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Piece of cake to install, has no effect on normal ride (which is good). It's too soon for me to give any meaningful feedback re use when vehicle is loaded but everything is positive so far and I can definitely see how they would help under heavy loads. Compared to the standard bump stops these are almost twice the height so the axle will definitely hit these before they would've hit the OE version and give the heavy duty nature of these, combined with the "hollow" design I can envision how they'll add to the stability of the suspension under max loads. 450768



- TFR150RA
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


The Timbren Suspension enhancement system is amazing. These took all of the swag right out of the Raptor with the trailer attached. Love them! Check out the before and after shots. Also got the best deal I can find on them through e-trailer. Always helpful staff and great communication with any questions. 496760



- TGMRCK25D
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I INSTALLED THE TIMBRENS ON 7-5-12 AS PER PREVIOUS REVIEW. I TRIED THEM TODAY PULLING MY 35 FT. 5TH WHEEL.THESE THINGS ARE WORTH EVERY PENNY,VAST IMPROVMENT. THE TRUCK HANDLES BETTER,SITS BETTER,RIDES BETTER UNDER LOAD. GOOD JOB ,ETRAILER 50638



- TGMRG25C
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


product came fast. Took some time to install .Video was helpful. Will order and install front suspension bump stops next weekend. 50560



- TGMRG25C
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


Got the added support I needed to haul my boat. Big difference in the sag of the rear end of my vehicle 142491


Comments

Working out great. Still no sag at rear of vehicle.

Katy - 07/21/2015

13569

- TDDRDURA
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


I received this order quickly. I installed them without any problems and they do offer additional support as shown in etrailer's website. Seems like a good product so far. 79045


Comments

The product has worked as described on the website. They have been excellent as a suspension enhancement. My Durango used to squat 3 and one half inches before installation of the Timbren support. Now when hooking up my boat my Durango goes down 2 inches and stops. I have great support and better control of my vehicle especially when fully loaded on a family vacation. Great product.

Dave O - 05/05/2014

3971

- TFR350SDJ
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


They have performed as described. When hooked to my gooseneck trailer truck squat is minimal, and best part is hassle free install and forget. I have been driving empty and unhooked without any notice to ride difference unless I hit a bad pothole. I would recommend them to anyone looking into option of airbags. 573990



- TGMRCK15S
by:

Review from a similar Timbren Aeon Spring System in Vehicle Suspension


very good product ,took the truck out to test timbren rear suspension,the trucks ride was not changed buy them with out a load. easy to install them, took a very short time to put on. have not had chance to hook the trailer up but i would say they will do the job well 180726


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Ask the Experts about this Timbren Vehicle Suspension
Do you have a question about this Vehicle Suspension?


  • Will The Timbren Rear Suspension Work on the Rear of a 2001 Ford F-53 Class A Motor Home
  • Timbren does offer a suspension kit for the rear of your 2001 Ford F-53 Class A Motor Home. It is the Timbren Rear Suspension Enhancement System, part # TFRF53A. It will install in place of the bump stops on the vehicle. They are designed to work with a suspension system that is in good working order. They are not designed to be used as the main suspension system on your vehicle. It works by being installed on the vehicles frame rail one inch above the rear axle. The one inch clearance...
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  • Rear-End Sag in 2004 Silverado 2500 4X4 Crewcab With Weight Distribution System Installed
  • The best way to fix rear-end sag when towing your 7500-lb trailer with your truck is to use a weight distribution (WD) system. Rear axle suspension helper kits, such as Timbren jounce springs or air bag kits, are better for times when you are carrying a heavy cargo load in the truck bed. These will not give you the same benefits as a properly-tuned WD system when towing a trailer. In fact, if jounce springs or air bags are used along with WD, then they can sometimes interfere with each...
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  • Timbren Front Axle Suspension Kit # TGMFK25S for 2006 GMC Sierra 1500 SLT
  • The Timbren front-axle jounce spring suspension kit you referenced, part # TGMFK25S, is a fit for both 2WD and 4WD versions of the 2004 Sierra 1500 SLT. These bolt-on without any drilling required (using included hardware) and replace the factory bump stops now on your truck. These and all other suspension enhancement products we offer are designed for use in vehicles whose suspension system is in good order. They are not intended to be an alternative to replacing a worn or damaged suspension....
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  • Recommended Front Suspension Enhancement for 2007 Chevy 2500 with Snow Plow
  • For your heavy snowplow, I recommend the Timbren Front Suspension Enhancement System # TGMFK25S over the Air Lift AirCell Custom Helper Springs Kit - Front Axle # AL52212. The Timbren Aeon Rubber springs are simply stronger and they work in the same way as the helper springs, yet offer more support on the front end, so that first inch gets support.
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  • Will Timbren Suspension Enhancement System Allow 2006 Chevrolet Truck To Sit Higher w/ Plow
  • The Timbren Suspension Enhancement System, part # TGMFK25S, will prevent the front end of your 2006 Chevrolet Silverado truck from sagging so low when a plow is mounted to the front of the truck. This system is designed to work with suspensions that are in good working order. I have linked and FAQ and instructions for the Timbren Suspension Enhancement System, part # TGMFK25S. I have also linked a video installation of another model of the Timbren Suspension System, on a different vehicle...
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  • Front Suspension Enhancement Recommendation for 2006 GMC Sierra 3500
  • The Timbren kit part # TGMFK25S that you referenced is a confirmed fit for your 2006 GMC Sierra 3500 but it's for severe duty applications so for you it would be very harsh. It would give you the support you want but at the cost of a very harsh ride quality. A better option would be the Air Lift AirCell part # AL52212 which gives you the support you would need but isn't as stiff so it wouldn't be nearly as harsh riding. This spring is 3.15 inches tall. There is also a small wedge as...
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  • Is there a 12-Volt Accessory Circuit on the 7-way of a 2011 Ford F53 RV
  • Yes, there is a 12 volt power source on the 7-way that is on your 2011 Ford F-53 RV. It will be on the 11:00 position of the connector as you look at the front of it. Check out the picture I attached that has a picture with all of the terminals of a 7-way labeled with their functions. You might want to test for voltage on this circuit with a Circuit Tester # 3808 as well just to be sure. I also attached an FAQ article on trailer wiring that you might find informative.
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  • Rear Suspension Enhancement Recommendation for 2003 GMC Sierra with Quadrasteer
  • I spoke with my contact at Firestone about whether or not the Ride-Rite Air Helper Springs, # F2190, will fit your 2003 GMC Sierra with Quadrasteer. He stated that none of the Ride-Rite kits would work on your specific vehicle. But not to worry, there is another option. I then spoke with my contact at Timbren, another maker of suspension kits. He stated that there was a kit available for your truck. Take a look at Timbren Rear Suspension Enhancement System, # TGMFK25S. These are an...
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  • Recommended Front Suspension Enhancement for 2002 Chevy Suburban 2WD 1500
  • For the front suspension of your 2002 Suburban, I'd recommend the Timbren Aeon Springs, part # TGMFK25S. Installation is straightforward. You'd remove existing bump stops, and use the hardware and existing holes to instal the rubber Aeon spring. The springs get progressively stiffer as more weight is added to them, they typically come into play when a plow or some other very heavy piece of equipment is installed on the front of the vehicle. I'll link you to the installation instructions.
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  • Suspension Enhancement System Recommendation for 2003 GMC Yukon 2 Wheel Drive
  • When it comes to a suspension enhancement system for your 2 wheel drive 2003 GMC Yukon, you will want to go with the Timbren # TGMFK25S. This system uses hollow rubber springs to absorb the brunt of the force on the front of your vehicle which helps to reduce sag and sway for better handling, traction, and a smoother ride. Part # TGMFK25S, for 2 wheel drive, and part # TGMFK15A, for 4 wheel drive, differ in design and installation. The 2 wheel drive version is a bolt-on kit where as...
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  • Recommended Suspension Enhancement Kits for 2001 Suburban 2500 with AutoRide Leveling System
  • The AutoRide self-leveling and damping suspension system in your 2001 Suburban 2500 uses various sensors in the vehicle to control a compressor pump that continuously varies shock damping while driving. This system cannot be defeated and aftermarket air springs like the Firestone Ride-Rite cannot be installed on the vehicle according to my contact at Firestone. However, you can install a set of rubber jounce spring such as the Timbren front-axle kit # TGMFK25S and rear-axle kit # TGMRSB4S....
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  • Timbren Recommendation for 2008 Chevy Silverado 3500HD Towing Heavy Fifth Wheel
  • The Timbren system I would recommend recommend would be the part # TGMRCK35S. It's the lighter duty of the two kits but the heavier duty part # TGMFK25S but it's going to provide a very stiff ride. The # TGMRTT35S still provides the 8,600 lbs of support which will work great. The HD is really needed only in very extreme situations like tow trucks.
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  • Rubber Jounce Spring Suspension Kit for 2006 Chevrolet 3500 2WD Flat Bed Work Truck
  • If you want a suspension helper spring kit that avoids the complication of air springs, then I suggest a rubber jounce spring kit from Timbren. We offer both front- and rear-axle kits for your 2006 Silverado 3500 2WD flat bed work truck. The rear axle kit I recommend is the Timbren # TGMRTT35C which is intended for heavy-duty vehicles. This is a bolt-on kit that requires no drilling. If you want a front-axle kit I suggest Timbren # TGMFK25S, also a no-drill install. The linked article...
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  • Suspension Enhancement Recommendation for 2002 GMC Sierra with Quadrasteer
  • I spoke with my contact at Firestone about whether or not the Ride-Rite Air Helper Springs, # F2190, will fit your 2003 GMC Sierra with Quadrasteer. He stated that none of the Ride-Rite kits would work on your specific vehicle. But not to worry, there is another option. I then spoke with my contact at Timbren, another maker of suspension kits. He stated that there was a kit available for your truck. Take a look at Timbren Rear Suspension Enhancement System, # TGMFK25S. These are an easy...
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  • 2004 GMC Yukon Timbren Suspension Kit Recommendation for Front and Rear Axle
  • For your 2004 GMC Yukon XL we have the Timbren suspension kit part # TGMFK25S which fits the front suspension and then the part # TGMRSB4S which fits the rear. Both of these kits act like bump stops except are much larger to make contact sooner than the standard bump stop so that they can provide additional suspension support.
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  • Size of the Bolts that Come with the Timbren Suspension Enhancement System TGMFK25S
  • I checked with Timbren and the bolts that come with the Timbren part # TGMFK25S that you referenced are M10x1.5X30.
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  • Timbren Suspension Kits for 2000 Chevy Silverado 1500
  • We have both front axle and rear axle Timbren rubber spring suspension enhancement kits for your 2000 Chevy Silverado 1500 that are displayed on the linked page. You can also see other kit options including air bags. For a rear axle Timbren kit you can use # TGMRCK15S which fits both 2WD and 4WD models. If you are interested in a front axle kit too, in case you use a snowplow for example, you can use Timbren kit # TGMFK25S for 2WD or kit # TGMFK15A for 4WD (if the truck is a 2-door model).
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  • Timbren Rear Suspension Enhancement For a 1999 Chevrolet 3500 2WD Dually
  • The Timbren Suspension Enhancement Springs, # TGMFK25S, that you referenced will fit your 1999 Chevrolet 3500 2WD dually, but these springs were designed for service vehicles such as tow trucks. Keep in mind, these springs are designed for the front axle, not the rear. It would be better to use Timbren springs on your rear axle when carrying your camper. For your truck, I recommend the Timbren Rear Suspension Enhancement Springs, # TGMRCK35. Adding a set of Timbren springs to your truck...
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  • Recommended Suspension Enhancement for 2002 GMC Sierra 2500HD With Snow Plow
  • For your 2002 GMC Sierra 2500HD, I recommend the Timbren Front Suspension Enhancement System # TGMFK25S to help prevent the sag you are experiencing when the snow plow is attached. These springs have a 14,000 lb capacity and are going to do a great job of providing you with the support you need on the front of your Sierra. The Timbren system will help bear the brunt of the load when your plow is attached so you can stay level. They are also remarkably well-reviewed by our customers who...
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  • Spacer Recommendation for a 2006 Chevy 2500HD with a 2 in Lift Installing Timbrens
  • What you would want to use is a Timbren Spacer for Raised vehicles # A25723-90AH00. This spacer is 1 inch thick so you would want to use two of them since you have a 2 inch lift. For the rear you would want the Timbren Rear Suspension System # TGMRCK25S, for the front you would want the Timbren Front Suspension System # TGMFK25S. Since you will need 2 spacers per Timbren and you plan on putting them on the front and rear axles is looks like you would need a total of 8 spacers.
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  • Best Brake Controller, Suspension Enhancement, and WD System for a 2004 GMC Yukon Towing 7K Trailer
  • It looks like your 2004 GMC Yukon Denali has a towing weight capacity of 8,000 lbs. You will want to verify this in your owner's manual, but if this is the case and your loaded trailer weighs 7K then you should be good to go. If the 7K weight is without the trailer loaded then this could get a bit tricky and you will be pushing the weight limits of your vehicle. Adding a brake controller, weight distribution (WD), and some suspension enhancement will definitely help to make your towing...
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  • Suspension Enhancement Kits for 2003 Hummer H2
  • Firestone Level-Rite Air Helper Springs and Shock Absorber Kit F1003 does NOT fit your 2003 Hummer H2 but all suspension enhancement products for this vehicle can be seen on the linked page. The front axle kit we have comes from Timbren and it a set of rubber jounce springs designed to support your front suspension when it is under load, such as when using a snow plow on the vehicle, kit # TGMFK25S. This no-drill kits includes rubber springs that provide progressive resistance when under...
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  • Front Timbren Kit Availability for a 2001 Chevy Suburban 4x4
  • The part # TGMFK15A that you referenced will fit a 2001 Chevy Suburban 1500 4x4. If instead you have a 2500 model you would want the part # TGMFK25S. By nature these Timbren kits will not stiffen up the front suspension unless you have a decent load on the front of the truck. Unloaded you shouldn't notice them installed.
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  • Is Rear Timbren Suspension Enhancement System Available for 2004 Mitsubishi Montero
  • I spoke with my contact at Timbren and the Rear Suspension Enhancement System for your 2004 Mitsubishi Montero is part # TGMFK25S. This system eliminates suspension sag, cushions road shock, reduces sway, and improves roll stability.
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  • Timbren Suspension Kits for 2004 Chevrolet Tahoe 2WD
  • The jounce spring kit recommended for the front axle of your 2004 Chevrolet Tahoe 2WD is part # TGMFK25S. The kit you referenced, part # TGMFK15A, fits the front axle of the 4WD version that does not have the police package. All front and rear suspension enhancement kits for your 2WD Tahoe, including jounce springs, air bag kits and coil helper springs, are shown on the linked page.
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  • Suspension Enhancement Recommendation for a 2000 GMC Truck that Acts and Anti-Sway As Well
  • We have the perfect product for you. The SuperSprings helper springs part # SSA13 will give your rear suspension 5,000 total lbs of support and will greatly reduce the amount of sway on your truck. A coworker of mine installed these on his vehicle and said that along with the suspension support he was surprised by how well these worked as an anti-sway device.
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  • Front-Mounted Hitch Receiver for 1999 Chevrolet Silverado 1500
  • Draw-Tite front-mount hitch # 65028 fits the 2500 series pickups for year 1999, but for your 1500 series you'll use Draw-Tite's front-mount hitch # 65023. If you prefer a no-drill installation then instead you can use Curt's # 31302. These are the two options for your truck. If you'll be using the hitch to support a heavy load such as a snowplow or cargo carrier, you might want to consider some front-end suspension support. Timbren jounce spring kit # TGMFK25S works on 2WD models and...
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  • Suspension Enhancement Recommendation for 2004 Chevy Tahoe
  • Timbrens are going to be what I would recommend for your 2004 Chevy Tahoe. They are better suited for heavier duty applications like what you have so for that the # TGMRYS4 would be what you would want for your 2004 Chevy Tahoe. I attached an install video for you to check out as well. For the front you would want the Timbren kit part # TGMFK25S.
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Info for this part was:

Photos by:
Theodore B
Expert Research:
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Jeff D
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Jameson C
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John H
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Adam R
Updated by:
Mary E
Video by:
Jonathan Y
Installed by:
Robert C

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