Most Popular SuperSprings Intl for 2021 GMC Sierra 1500

The product looks good and it set the rear end of our truck up a little. My wife and my friend sat on the tailgate to give us an idea what kind of ride we might get and the body sat down just a little with that weight. The instructions could definitely be a little better due to that we looked on [line] for more information.Can't wait til I pull the 7500 lb trailer next week to see the ride and if it took the sway out. Best I can do so far. Will add photos when I test this out and two of my friends want to know how this does.

Just as advertised. Easy to put on once I figured out to jack up the frame not the axel. Thanks for good service etrailer.

Easy install prompt delivery

Installed them today but, haven't put a load on them yet. Drove around with them and am excited to get my trailer hooked up. They are no joke. I will be pulling almost 9500 lbs with my gmc 1500. The truck does great the handling needed some help.

Have not installed the product yet. I'm sure they will function as advertised. I've been extremely pleased with etrailer to date. Every order I have placed is processed efficiently- and quickly. ( TNX Kelsey S. ) Follow up on the delivery and shipment is outstanding.( Kelsey S. again ). I am a real human- and buying truck parts on-line can be touch and go. These folks are the real deal.....human like.:) Do not hesitate here... I highly recommend e-trailer. Dick V. Coeur d Alene ID

The Sumo springs engaged to early. The dwell between the axle, and the sumo spring is only half an inch. So unless the sumo spring is fully engaged, the truck bounces significantly every time we hit a bump. I would reduce the overall length of assuming spring by at least a half inch to allow time for the shocks to engage.

The installation was a bit slower as this was a 2002 GMC Sierra 1500 and the bump stop did not have the bolt in the hollow opening. Instead, the bump stop and cup came off by removing a nut between the bracket and frame. Access to that bolt is more difficult but doable with an open end wrench. Then use the provided spacer and in my case one washer, and the provided nut and bolt to secure the spacer. The Sumo spring then simply screws on. Both fit very well leaving a gap between the spring and Axle. This installation was on a quadrasteer Denali. Very pleased with etrailer's written instructions (although a video for this vintage truck would have been great) and their delivery time.

These Sumo Springs were easy to install, even for a 70 year old guy. I tow a 7,000lb camper and even tho I have a nice WDH I still had som sag on my Tundra. These helped level it out when towing and got rid of “some” of the bounce. They were really a godsend when I overloaded the bed with about 2,000lbs of pavers. That weight squished the Sumos significantly but the truck drove and rode great. Better and less expensive than air bags.

Pros: Easy install Drastically helps with sag when towing trailers Cons: Things feel more bouncy in the back when not loaded They get hard as a rock in freezing temperatures (i.e. 15*F = no rear suspension) No option to unscrew the spring and replace with bump stop for the winter (at least that I can find, tell me if they make one).

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 Super Springs work great! I pull a 8,500# trailer with a hitch weight of 950# with a 2004 GMC Sierra 1/2 Ton. The truck pulls fine but even with an equalizer hitch still had some sag. The Super Springs were easy to install and leveled the rig. After a year everything still works great.

I bought these for my 2011 Silverado 1500 crew cab 4wd, truck had a 6” lift and 35” tires. I was frequently towing a 5k pound horse trailer ( bumper pull not gooseneck ) and was getting a lot of bounce in the truck. As a honest review, I installed them ( quick and easy I add ) and removed them a month or so later. They did everything they were suppose to, sway was better, felt more In control at high speeds, and less squat on the truck. My complaint was my truck rode like a 3/4 ton truck without the trailer and I didn’t have 3/4 ton power. So I removed them to get my ride quality back, eventually selling the truck and buying a 3/4 ton. Now in another 3/4 ton for a few week, I would say it wasn’t as bad as a true 3/4 ton, but it does firm up the ride a bit. I still give it 5 stars because it did exactly what it was suppose to, super cost effective, easy to install and remove, no fabrication etc. also I requested some precise measurements on individual pieces from etrailer customer service for fitment with my lift kit and they responded same day with all measurements I needed. Sum up if your debating, it’s easy to install, easy to remove, way cheaper than bags, adjustable, work great.