Most Popular Bump Stops for 2004 GMC Sierra

Added these Timbrens with two 1" spacers on each side on a 2011 GMC Sierra with a 2" lift. Fit great, easy to install. Was more work getting old bump stops off than installing the new Timbrens with spacers. I did need to get 2" longer bolts than what was included to complete the install, but that was to be expected.

Received yesterday (quick shipping!), installed today on 2015 GMC Sierra 1500 4WD Crew Cab short box. What a difference between the Timbren's and OEM bump stop from GMC. Installed for towing large travel trailer. Used floor jack under rear hitch to raise up truck to get enough room for socket to install bolts. Use 10mm socket to remove OEM bolt & bump stop, use 17MM socket to install new bolt and Timbren. Very east installation process.

very rugged, haven't put them in yet, just got home at 11 pm, will crawl under the truck tomorrow

Used them on every pickup I've had. The latest is my 24 GMC Sierra. With the camper hooked up and tongue jack down, pulled the old rubber bumpers off, lifted just enough to clear getting the timbrens under along with a 3/4 inch small piece of wood then let them down with the weight of the trailer to pop them on place. Then lifted enough to get the spacer wood out and that's the extent of the install. Literally took between 5-10 minutes. Timbrens are seriously one of my favorite upgrades of all time.

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!

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

This review is on a timbren air spring ,I bought this on a Saturday night ,went out of town Monday morning and got in on Thursday afternoon ,wife said the box had arrived Tuesday and put them on this morning on our 2006 Chevy k-3500 ,my guy had the truck in our shop for an oil change and I asked him to put it on, came back 45 min later and he was done with the spring installation and the oil change ! I asked him how hard it was and he said it took him longer to figure out which parts in the kit he needed that the actual install ,said it was about as easy as it gets .Well ,now for the test drive we drove the truck empty ,pretty much as stock ,rode real well.Then we put a Gaylord box that weighed 4506# and drove the truck ,WoW ,What a difference ,truck rode great and handled well ,went over railroad tracks,really handled well and rode great ,I wish I'd have done this years ago ! I highly recommend this product and commend etrailer on their good service and what made me decide to purchase the timbren product was the you-tube video ,after I saw that ,I placed the order ,it looked so simple to install and it went on just like on you-tube

2009 GMC Sierra CC 2WD Installed after my wife came home with a 600lb decorative stone from a one hundred year old high school being torn down. Not having a good way to unload it, I decided to use it for winter weight last year. OEM springs were not sagging but my longer mudflaps did contact pavement at times and wanted more support on the curves. SumoSprings brought it up to factory height and gave the support in the corners.

Installed the next day. Great service at a good price.

i was pleasantly surprised to how easy installation was

I don't know what I thought this was, but, it definitely was not that. In my mind, this is just a fancy spring stop that replaces the one supplied by the manufacturer. Because of the thickness, my truck bottomed out more and quicker than with the factory stops. I had in my head (from reading from others) that this would help the suspension softness. It did not. I ended up putting airbags on the truck. It had weaker springs due to age (2005 model) and the stop would not help that. The airbags were a blessing. They eliminated the too-soft ride. Had I put the airbags on first, I doubt I would have ever put this product on. (Although we did find out that the factory stops were worn out and needed replacement.) I can not, and will not, degrade this product as it is well made and it was exactly as it was advertised. It just was not the product that I needed. Make sure what you need BEFORE you buy.

Sale rep was very helpful and made the sale easy. Fast shipping

Basically I was totally disappointed with the product. Instructions were very poor, at one point they said to install by using the rear hole of the two, there is only one hole in my truck. Instructions said to replace sway bar link bolt with the supplied bolt in the hardware kit. There were no nuts included to use the supplied bolts. My factory bolts were not the same size as the supplied bolts so nuts would not fit. Installation illustration was very poor. An actual picture would have been so much better. After install, there was no difference in my truck! This is no reflection upon etrailer. Steve even said that I could return if unhappy in any way but too much hassle to remove. Disappointment is all on timbren. I even tried calling timbren but they didn't answer and did not return my call. Thanks

My Timbren kit arrived quickly and was exactly as described. The fit on my '06 Sierra was perfect. Took me about an hour to install the fronts and an hour for the rears. The timbrens levels out my truck and elminated poor handling I was experiencing with a heavy load in the bed of my truck. I'm carrying equipment weighing about 1200 lbs in the bed of my truck. I was down on the front bump stops and had less than 1" of clearance on the rear stops. The timbrens leveled the whole truck and easily handle the load. I'm much happier with the ride and handling of my truck. It no longer rolls side to side through the corners and tracks normally on the freeway; even in high cross winds. etrailer.com provided good customer service and I really apreciated the fast updates on the status of my order.

Just had PEP boys install (it was 22 degrees outside) both front and rear. This review will be duplicated for the rear as well. Excellent, been meaning to purchase and install on my 2007 GMC 2500HD Classic. My pickup is now my weekend drive for the toy stores (Lowes, Home Depot...) Immediate improvement on handling, turning and stopping. Have not connected a trailer to it yet. Previous experience with Summo on 2005 E450 Shuttle Bus and a 2018 Thor Axis 25.5 RV.

Awesome product.

Installed these on my 2010 GMC 3500HD diesel, install was relatively easy, noticed handling improvement on the first corner pulling my 30' fifth wheel camper

Awesome product awesome service awesome delivery just simply awesome

I have purchased two sets of timbren rear suspension products for my 04 gmc and 21 gmc both set preformed as promised don't have o4 any longer but last I heard still doing there job. Have ordered several products from e-trailer great customer service and ease of ordering. Very satisfied with tibren and e-trailer would recommend to anyone.

I replaced the factory jounce bumpers on my 2003 GMC Sierra 1500 Denali Quadrasteer with these from SumoSprings. I had replaced the rear ones the year before with SumoSprings, and was so pleased with Sumo that I did the fronts. The fronts were a little more difficult to install, in that you really have to jack the truck way up to generate the gap needed to get these front ones installed. However, once installed, I noticed an immediate difference in the feel of the truck. These are a little pricy, but they are worth it, and definitely outperform the factory jounce bumpers. If your old jounce bumpers are worn out and need to be replaced or if you are looking for a quick, easily installed ride improvement, then I recommend this upgrade. No regrets here after a year of driving on them.

A product that works as it should, my truck doesn't squat when carring a full load, and the front set prevents the nose of the truck from drooping when my snowplow is on, there for preventing extra wear on my blade. Truly easy to attach, A very good addition to my truck.

They worked pretty good. They kept my vehicle from bottoming out when towing my 5th wheel camper. They also helped to avoid bucking and chucking upon acceleration. In addition to these though I also purchased RAC rear suspension enhancement springs but having towed with them yet. Hoping for some improvement in general handling.

I believe it’s going to be a great addition to my truck when pulling our RV. Looking forward to a smoother, more even ride. I left the 2x4 blocks in overnig8ht and drove around to ensure a good seat for the springs.

These literally took 30 minutes to install. I did install them with the wheels off and then installed the super springs as well. Towed a 8K lb bumper pull 900 miles after installation and they combined with the super springs transformed how my 1/2 ton towed. 2017 GMC Sierra 4x4. Fit was excellent and quality was good, USA made a definite plus.

Won't know until i get them installed

These coil spring helpers are near perfect in every way and easy to install. These do not not increase ride height in any meaningful, but instead both firm up a sagging coil spring suspension or one that that may be sprung a bit too soft from the manufacturer - as is the case with my chrysler pacifica. When the Pacifica is either at full passenger load or when adding tongue weight to my hitch - the pacifica sags and is too bouncy... even over parking log speed bumps - it is sprung very softly from the factory. I originally simply added the rear coil helpers, but after seeing how well they performed, I decided to put the front ones on as well. There are significant safety and enhanced drive-ability benefits having increasing suspension stability when a car is loaded down in any way. There is barely any noticeable ride quality degradation when the Pacifica is unloaded as the spring coil helpers are not being engaged except under load. Regarding installation - I used my band saw to cut off 1 inch from each spring so that the overlap was 3/4 inch when fully installed. Also, I used 4 quick squirts of spray Dawn dish soap prior to install - easy peasy...the spring helpers slid on without much fuss. I did use a large screw driver to assist seating the helper a bit, but installation was both easy and straight forward. These are high quality urethane coil helpers and not simply less performing and durable rubber ones - which wears out much faster and do not perform nearly as well.

I love how this makes my ride feel. Great product.

The product is exactly as described and the installation was extremely easy!!! Pic shows the OEM (orange) versus the Timbrens (black).

After a year of ownership and towing my toy hauler many times, I’m happy I went with Timbrens as opposed to air bags. Easy install, maintenance free, and they really do help keep things level.