How to Help a 2018 GMC Sierra 1500 with Rear End Sag

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Question:

Thank you Connor. What is the length on these steel springs? I was thinking maybe getting the Air Lift Aircell custom helper springs maybe because they have more adjustments spacers in the kit. Whats the best route to go?

asked by: Steve

1

Helpful Expert Reply:

In order to help keep the rear end of your 2018 GMC Sierra 1500 from sagging while towing or hauling your four wheeler I recommend using the SumoSprings Solo Custom Helper Springs part # SSR-209-40. This spring will replace the factory jounce spring that you have on your truck and provide you with a cushion between the frame and rear axle that will help to alleviate some of the rear end sag you have while towing or hauling. The best option about this system is that it will not affect ride quality while unloaded. The photo you have attached is of the factory jounce spring and I do not recommend adding a spacer nor do we have any options for that.

These springs are also very easy to install as you can see in the attached install video.

expert reply by: Conner L

1

click to enlarge

Steve

7/23/2018

Thank you Connor. What is the length on these steel springs? I was thinking maybe getting the Air Lift Aircell custom helper springs maybe because they have more adjustments spacers in the kit. Whats the best route to go?

Conner L.

7/23/2018

The SumoSprings Solo Custom Helper Springs part # SSR-209-40 are around 5-1/2" tall whereas the factory jounce springs that they replace are around 3-3/4" tall. The Air Lift AirCell Custom Helper Springs Kit were a bit underrated and not much of an upgrade over the factory option even with the adjustable spacers so they were discontinued. I highly recommend the SumoSprings as they work really well, are easy to install, and cost effective.

Answer 1

For the SumoSprings #SSR-209-40 for your 2012 GMC Sierra 1500 4x4 the springs will reach their 1,000 pound capacity at 50 percent compression. That means that there could still be some squat until the spring compress enough to stop it. But at the…

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Answer 2

Thanks for the photo and the Timbren Rear Suspension Enhancement System #TGMRCK15S you mentioned is a good option for helping keep your 2020 Chevy Silverado 1500 level, but the best option is something a little different, the RoadActive Suspension…

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Answer 3

The SumoSprings Solo Custom Helper Springs like part #SSR-209-40 can be in contact with the jounce spring contact point without a load present. Depending on which kit you have, there is sometimes a spacer that will allow you to have either a slight…

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Answer 4

I have two options for you to help with squatting while towing with your 2014 Chevrolet Silverado 1500. These two options are the Timbren Rear Suspension Enhancement System part #TGMRCK15S and the SumoSprings Solo Custom Helper Springs part…

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Answer 5

The SumoSprings Helper Springs, #SSR-302-54, will operate with no issues under normal driving conditions. The springs are designed to begin to impact the truck's suspension when the suspension is under a load. The OEM suspension components, like…

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Answer 6

I looked up the owners manual for your truck and your maximum trailer weight capacity is 9,200 lbs and your GCWR is 15,000 lbs. Timbrens #TGMRCK15S are designed to help support the rear of the vehicle when towing a trailer. They essentially stop the…

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Answer 7

I have a couple of recommendations for you. A truck suspension enhancement system will help reduce sag and will help with sway especially if you are close to the maximum towing weight limit of your truck. If you are not close to the weight limit,…

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Answer 8

For your 2014 Chevrolet Silverado 1500, the addition of the jounce springs in the Timbren Rear Suspension Enhancement System, #TGMRCK15S, will not change your normal daily use of your truck except with bumps. These jounce springs are pretty strong,…

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Answer 9

It's pretty normal to experience a rough ride with the Timbren Suspension Enhancement System part #T28MR on a 2019 Chevrolet Silverado 1500 while going over bumps unloaded. There isn't much that can be done to stop that with these springs but…

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Answer 10

All of the Timbren and other rear-axle jounce-spring kits we have for your 2014 Chevrolet Silverado 1500 4x4, shown on the linked page, feature a bolt-on installation. If you refer to the linked page for Timbren kit #TGMRCK15S you will see in the…

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Answer 11

The Timbren Rear Suspension Enhancement System part #TGMRCK15S is a great option to help reduce sag while towing with a 2017 Chevrolet Silverado 1500 but they do have a tendency to ride rough as the material is very dense. I think the perfect option…

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Answer 12

The SuperSprings product will somewhat help with the bouncing you're experiencing, but I'd recommend that system more for preventing rear end sag and sway. For what you're experiencing, I'd recommend either an air bag system or a Aeon…

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How to Help a 2018 GMC Sierra 1500 with Rear End Sag

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