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  1. Vehicle Suspension
  2. GMC
  3. Sierra
  4. 2013
  5. Timbren
FITS 2013 GMC Sierra
Timbren Rear Suspension Enhancement System
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Timbren

Timbren Rear Suspension Enhancement System

Part Number: TGMRCK25D
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$269.36
Retail:$316.90
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Vehicle Suspension
Confirmed to Fit
2013 GMC Sierra

2500

3500 - Cab and Chassis

3500 - Pickup

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Timbren vehicle suspension for your 2013 GMC Sierra are available from etrailer.com. Installation instructions and reviews for your GMC vehicle suspension. Expert service, and great vehicle suspension prices. etrailer.com carries a complete line of Timbren products. Order your Timbren Rear Suspension Enhancement System part number TGMRCK25D online at etrailer.com or call 1-800-940-8924 for expert service.
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2013 GMC Sierra - Timbren Rear Suspension Enhancement System

  • Bump Stops
  • Towing/Load Leveling
  • Timbren
  • Extra Heavy Duty
  • Rear Axle Suspension Enhancement
  • Suspension Only

8,600-lb Capacity. These hollow rubber springs sit above the rear axle to help 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, handling and safety
  • Provides additional support as needed, so you always get a smooth, comfortable ride
    • Allows the leaf spring ample movement and cushions light loads
    • Becomes more rigid as more weight is added
      • Increases stability - gives you great performance when you are hauling heavy loads
      • Reduces vehicle sag
  • Works independently - side to side
    • Helps to compensate for off-center loads
    • Reduces body roll when you have to swerve or execute a sharp turn
  • Acts as shock absorber, taking the brunt of bumps and rough roads
    • Extends the life of your vehicle's suspension


Specs:

  • Includes 2 Aeon hollow rubber springs, vehicle-specific brackets and hardware for simple installation
    • Replaces axle bump stops on frame
    • No drilling required
  • Capacity: 8,600 lbs
    • Do not exceed your vehicle's weight-carrying capacity
  • Designed to work with a suspension system that is in good working order
  • Limited lifetime warranty - satisfaction guaranteed


An example of sag on a vehicle's rear axle under a heavy load

Whether you're hauling heavy loads in your bed or cargo area or you're towing a trailer, you will often see the rear of your vehicle sag while the front end rises. In these cases, the rear axle is handling not only the weight of the cargo, but also more of the vehicle's weight. Because less weight is on the front axle, the front tires are making less contact with the road. Overall 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.


Diagram of the Timbren spring installed

The Timbren system comes with custom-fit brackets that are bolted onto each frame rail above the rear axle. Hollow rubber springs are bolted to the bottom of the bracket and hang down to where the bottom of the spring sits, 1" above the axle. The inch of clearance allows the existing factory suspension to operate normally under light loads and standard terrain, ensuring the smooth, comfortable ride that you are used to.


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 vehicle 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 vehicle. 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 are hauling off-center loads.


An example of a trailers swaying

Because the vehicle handles better with the springs, less turbulence will be passed along to the trailer, and this helps to keep the trailer in line. Your driving comfort is further enhanced if the trailer does begin to sway (from a gust of wind or a passing semi), because the movement from the trailer is not transferred to your vehicle. This also works to make the sway subside more quickly.


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 when loaded. 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. And more elasticity allows for a more comfortable ride when loaded or towing because the rubber has more travel.



GMRCK25D - Rear Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TGMRCK25D Installation instructions

Customer Satisfaction Score:

Ratings & Reviews

4.7

4079 reviews
5 Stars
(3249)
4 Stars
(530)
3 Stars
(123)
2 Stars
(77)
1 Star
(100)
8,600-lb Capacity. These hollow rubber springs sit above the rear axle to help 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.

by:

Working really well, should have bought this first. Very easy to install.



by:

Very easy to install and did everything it said it would do. I'm very pleased with the quality.



by:

Excellent product. 2000 pounds in the box of my F-150, always stable on the
road.



by:

These work like a champ. Ten minute install and removes the rear end squat straight away.



by:

Yes I like them they do a great job and was easily installed directions was easy to follow



by:

These have helped with squat and swaying but definitely rough the ride.



by:

This is my second vehicle with the Timbren system. Simple to install and they work Awesome.



by:

Install was a snap. Works as anticipated. Leveled out our 2014 F-250 very well when loaded vs without.



by:

The product was very durable and good quality, I didn't need the spacers because without them I had 1" clearance until any weight was placed on the truck. I did have use the longer bolts however to get a strong torque when tightening the rubber spring. NOW THE TEST...I hooked up my 30' trailer using my equalizer 4 point hith, looking under the truck the rubber spring was pressing on the bumper stops just enough to seat firmly. After everything was hooked up, away we went! Test drive.... I must say, the truck and trailer handled great. The truck was not bouncing when driving, it had a solid feel to it. After finding a level street to park on, I got out and looked at the trailer and truck... Perfect! Nice and level.... I hope this helps another person decide the product works. Thanks trailer.



by:

The product was very durable and good quality, I didn't need the spacers because without them I had 1" clearance until any weight was placed on the truck. I did have use the longer bolts however to get a strong torque when tightening the rubber spring. NOW THE TEST...I hooked up my 30' trailer using my equalizer 4 point hith, looking under the truck the rubber spring was pressing on the bumper stops just enough to seat firmly. After everything was hooked up, away we went! Test drive.... I must say, the truck and trailer handled great. The truck was not bouncing when driving, it had a solid feel to it. After finding a level street to park on, I got out and looked at the trailer and truck... Perfect! Nice and level.... I hope this helps another person decide the product works. Thanks etrailer.



by:

Seems to have taken a lot of the roughness out of bumps and washboard dirt roads



by:

Very easy to install and they worked as indicated keeping the back of the truck level.



by:

Worked great, easy to install and I no longer get ss much bottoming out...



by:

Pricey, but effective. The ride is unaffected when not towing. While towing, there is a bit more bounce on uneven rough pavement. Great on smooth even pavement.



by:

Easy to install. can haul heavier loads without the rear squat. works great.



by:

Excellent product,great service from Adam E highly recommend doing business with these people



by:

Springs hold up good really helped out with the problem. My F450 squats less than before.



by:

Eliminated rear end sag when towing and also stabilized the rear improving drivability. Highly recommend.



by:



by:

Too stiff of a ride. Felt like an old bouncy truck with a load on. They are sitting on my garage self.



by:

Installed these on 7/6/2018. Install was pretty strait forward. Sure made a difference on the ride height. It is one of our service vehicles that we have, so we shall see if the driver of it notices the difference.



by:

Have installed product on other PU. REALLY ENJOYED ORDERING FROM YOUR WEB SITE. I hate ordering on-line but found your web site a pleasure to deal with. Great Job.



by:

Made my 1500 Dodge tow way more stable. took all the sway out of the truck when rolling down the highway



by:

This is regarding the FRONT installation. Which is everything I'd hoped for. The truck still rides great but no longer bottoms out over any pebble in the road.
The front end no longer heals over in turns. I wanted to install a rear kit but it arrived as a mis matched box of parts. To be continued.



by:

Works like I wanted it to. It does not bottom out like it did before. It stays straight in line with camper.


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Show More Reviews

See what our Experts say about this Timbren Vehicle Suspension

  • Suspension Enhancement for 2020 GMC Sierra 2500
    If you're towing most of the time then I would go with the Timbren Rear Suspension Enhancement System # TGMRCK25D. These will provide the most support for your 2020 GMC Sierra 2500 while towing your 5th wheel. If you're more concerned about ride quality then the RoadActive Suspension # RAS3611-HD would be the better choice. The Timbren has a tendency to be a bit rough when you aren't towing or hauling. If you want the best option possible I would go with the Firestone Air Bags # F2709....
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  • Rear Suspension Helper Springs for a 2018 GMC Sierra 2500 Towing a 5th Wheel Trailer
    Hello, I will be happy to help you select some helper springs to improve the ride and level out the truck when you are towing. Timbren springs are an easy install but they will make the ride stiffer when you are not towing. The similar SumoSprings Solo # SSR-207-47 will also level out the truck but will not be as stiff when not towing compared to the Timbren springs. Another option to consider is RoadActive Suspension # RAS3611-HD. Installation is easy with this kit as well. It will...
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    Image 1 for
  • Timbren or Hellwig Load Pro for 2023 Chevy Silverado 2500
    Hey Uwe, I would definitely go with the Hellwig Load Pro 35 part # HE93XR over the Timbren. The Timbrens are notoriously harsh and bouncy and since that's not what you want I would definitely avoid them at all costs. Hellwig will give you the support and stability you are wanting while actually improving the ride quality instead of hurting it. I have another option you might be interested in too if you'd be interested in?
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  • Does Timbren Suspension Enhancement Fit 2025 Chevy Silverado 2500 ZR2
    Hey Jordan, Yep, I went ahead and verified directly with Timbren the Timbren Suspension Enhancement System - Severe Service # TGMRTT35D are indeed a fit for your 2025 Chevy Silverado 2500 ZR2. That said, the Severe Service kit is designed for trucks that have in-bed campers or are used as work vehicles (like salt spreaders, etc.). So if you have an in-bed camper you keep on this will be great, but if you want the suspension upgrade for things like helping stay level while towing a trailer,...
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  • Does Using an Offset Gooseneck Ball Change where the Pin Weight is Carried in the Truck Bed
    If you were to use the 4 inch offset ball # BWGNXA4085 the pin weight on the ball will not be changed. What will change is where the weight is carried on the truck. Using the offset ball will put more weight 4 inches back from the center of the gooseneck ball hole in the truck bed. This may or may not affect the truck. Some things that could happen include reduced steering and braking and headlights angled upward. If the weight is far enough behind the rear axle it can lift the front...
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  • Can I Use Both The RoadActive Suspension Enhancement With The Timbren Suspension Enhancement?
    You can use both the RoadActive Suspension Enhancement Kit # RAS4611 and the Timbren Suspension Enhancement Kit # TGMRCK25D at the same time. The Roadmaster kit will take care of the travel the initial travel of your suspension, the Timbren will just support the suspension at the end of travel. Both will work great for enhancing your suspension throughout the complete travel of your suspension. They will not work against each other.
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  • Timbren Kit Recommendation for 2022 Chevy Silverado 3500HD with Slide In Camper
    Hey Ted, yes Timbrens would be a great option to add additional suspension support to your 2022 Chevy Silverado 3500. For that I would go with the part # TGMRCK25D though over the # TGMRTT35D as it would still give you the support you are looking for without being too harsh. The part # TGMRTT35D is a severe duty application which I would only recommend if you are basically at the capacity of your truck and won't ever really drive it without the slide in camper.
    view full answer...
  • Why Can't Timbren Be Used with 2025 Silverado Trail Boss (It Can!)
    I just confirmed with Timbren that the # TGMRCK25D DOES fit the 2025 Chevy Silverado 2500 Trail BOss.
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  • Lifted Truck Still Sagging with Equal-i-zer Weight Distribution System
    The adjustments for the Equal-i-zer Weight Distribution Systems like part # EQ37120ET will pertain to adding and removing washers from the head to try and get the spring arms as parallel with the trailer frame as possible. However, this may not completely level your vehicle. The majority of these systems are only designed to gain back half of what you lost and since your vehicle is lifted, there is an even greater chance that the vehicle will not be completely level. If you still seek...
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  • Compatibility of the Air Lift LoadLifter 5000 Springs on a 2016 Chevy 3500 Cab and Chassis DRW
    The Air Lift LoadLifter 5000 Helper Air Spring, # AL88339, is confirmed to fit the 2011 to 2015 Chevrolet Cab and Chassis 3500. However, my contact at Air Lift confirmed that the there are no air helper spring kits that fit the 2016 and on models. But I have a solution for you. We do carry the Timbren Rear Suspension System, # TGMRCK25D. This system will replace the OEM bumps stops located on the rear axle of your 2016 Chevrolet Silverado 3500 Cab and Chassis. The Timbren Aeon rubber...
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  • Suspension Enhancement Recommendation for 2016 GMC Sierra 3500 for Smoother Ride Unloaded
    We have found that the Timbren setups affect the unloaded ride quality of a vehicle more than the other suspension enhancement solutions. For a similar solution that we have found to be a bit less harsh the Firestone Work-Rite kit part # F8632 would be a great option.
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  • Which Timbren Kit Fits 2013 GMC Sierra 2500
    Hey Lyn, the correct Timbren kit for your 2013 GMC Sierra 2500 is the part # TGMRCK25D. This will offer you quite a bit of additional suspension support for your camper.
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  • Will Timbren TGMRCK25D Work On 2025 Chevy 2500 And 3500 Trail Boss? (Yes, It Will!)
    Hey Seth, thanks for letting us know. It looks like we recently had another of our customers confirm the # TGMRCK25D does work with the trail boss models as well. I will go ahead and add this page to the Q/A section for the # TGMRCK25D just so this information will be available for others to see. Thanks again!
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  • Comparing Timbren TGMRCK25D And TGMRTT35D For 2020 Chevy Silverado
    Hello Ken, thanks for reaching out. Both of the kits you mentioned, the Timbren # TGMRCK25D and # TGMRTT35D are correct for your 2020 Chevy 2500. The difference is the 25D is a standard duty kit, while the 35D is a severe service kit. The severe service kits are intended for vehicles with a constant heavy load in the bed like a truck bed camper, or salt spreader. They are designed to be constantly loaded. The standard duty kit is more suited for towing applications like travel trailers...
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  • Recommended Suspension Enhancement For A 2007 GMC Sierra 2500 With An In-Bed Camper
    Hi Mary, Do you leave the camper in the bed most of the time or does this truck spend a good chunk of time driving around without the camper? The SumoSprings Solo Custom Helper Springs # SSR-211-54 would be a great option if you leave the camper in the bed all the time. They take about 20 minutes to install and would just essentially replace the factory jounce stops for hassle-free, no-maintenance load leveling support. These have a 2,800lb capacity so they're be a bit stiff when the...
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  • Will Adding Timbren Bump Stops Affect The Adjustment Of My Weight Distribution Hitch?
    Hello Donny, thanks for reaching out. We do offer Timbrens for the 3015 Chevy Silverado 2500, for that I recommend part # TGMRCK25D. These likely will affect the adjustment of your weight distribution system. You will want to install the Timbrens first, then install and adjust the WD hitch as needed. What weight distribution hitch are you using?
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  • Why is Truck Fifth Wheel Towing Capacity Much Higher than Cargo Capacity
    Fifth wheel towing capacities are different from cargo weight capacities. The reason is mainly that a fifth wheel hitch essentially attaches to the frame of the truck (the strongest part of it), and the cargo capacity is more related to the weight capacity of the truck's bed. Your truck would have no problem with the weight of your fifth wheel trailer plus the cargo you mentioned adding.
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  • Solution for Installing Timbren on 2012 Silverado 2500 With Rusted Bump Stop Cups
    Hey Cliff! I'm sorry to hear you ran into that problem installing the # TGMRCK25D on your truck. You might be able to get those from your local dealer but I'm not sure. You could also have replacements fabricated and then weld them on. Unfortunately, Timbren does not make a specific bracket or alternate mounting system for this issue. The only other option would be to switch from the Timbren SES to something like the SumoSprings Rebel # SSR-203-40-2 which uses brackets for mounting instead...
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  • Choosing Between Timbren SES and RoadActive Kit for 2022 Silverado 2500 Towing 5th wheel
    Hey David! As long as you don't go over the 3,000 lb capacity I recommend the RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS3611-HD. The RAS is nice because it won't have a negative impact on your unloaded ride quality. It can also be adjusted if need be. If you think you'll be over 3,000 lbs the Timbren SES # TGMRCK25D is a better choice. However, these have a tendency to give you a harsh ride when you aren't towing or hauling. If you need the higher capacity and want...
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  • Suspension Enhancement for 2022 GMC Sierra 2500 AT4
    Hey Tim! If GMC says your truck can only handle 2,750 lbs that is the limit. There is nothing that can be done to increase this. Suspension enhancement like the # TGMRTT35D is designed to add additional support but will not increase the carrying capacity or towing capacity of a truck. Also, this is a severe service kit designed for constant loads like an in-bed camper. If you want a no maintenance option you're better off with the # TGMRCK25D. If you want something that is completely...
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  • Suspension Enhancement for 2019 Chevy Silverado 3500 Cab and Chassis that is Towing Trailer
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  • Timbren Springs Options For A 2024 Chevy Silverado 2500HD 4 Wheel Drive
    Hi Curt! We have two Timbren options for your 2024 Chevy Silverado 2500 with 4 wheel drive and I have them listed below: Timbren Suspension Enhancement System - Severe Service - Overall kit height: 5-9/16” - 8,000 lbs # TGMRTT35D Timbren Rear Suspension Enhancement System - Overall kit height: 6-1/4” - 8,600 lbs # TGMRCK25D The main differences between them is the overall height and capacity. Even with the # TGMRTT35D being slightly smaller and lower capacity, it would be the stiffer...
    view full answer...
  • Looking For Rear Suspension Enhancement For My 2022 GMC Sierra 2500
    Hey Marc, For your 2022 GMC 2500 I recommend the Timbrens # TGMRCK25D. These will greatly increase your ride quality when towing. I typically only recommend airbags to someone who is either towing lots of different weights or using a truck bed camper. The Timbrens are great for someone towing the same trailer over and over. With a simple no drill installation these will work well for you. What kind of 5th wheel are you pulling?
    view full answer...
  • Suspension Enhancement For an in Bed Truck Camper for a 2015 GMC Sierra 2500
    Great question Brian! Timbrens are the most commonly recommended suspension enhancement recommendation when it comes to putting in a truck bed camper. It is very strong and reliable so would be a really great option for you. I looked up your camper and it looks like the dry weight is around 3k lbs so once you add in any gear, water, fuel, and anything else into the camper, part # TGMRCK25D would be what you want to get. It is classified as an extra heavy duty. Now here comes the however,...
    view full answer...


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