Best Suspension Enhancement Recommendation for 2026 GMC Sierra 3500HD Denali Dually

Updated 04/30/2026 | Published 04/25/2026

Question:

Looking for rear axle bumper stops for towing 5th wheel. 2 sag max is what Im looking for. 3500hd 2026 sierrs denali 4wd dually Please advise...

asked by: Trevor V

Expert Reply:

Hey Trevor, the best suspension enhancement we offer for your 2026 GMC Sierra 3500 Denali dually is the Roadactive part # RAS3611-CHD. This will give you the suspension support you are looking for while also not affecting unloaded ride quality which every other option does and it also doesn't require any maintenance. What kind of 5th wheel do you have?

expert reply by: Jameson C

Roadactive Suspension
(click to enlarge)

Vince

4/29/2026

I installed the sumo helper springs on my toy hauler. They work well taking some weight off the shackles. I did have one fail out of the four. For some reason it squished down and didn't recoil. Sumo springs replaced it with no hassle.

Jameson C.

4/29/2026

@Vince glad they took care of you! That is pretty odd it never bounced back.

Dwain V.

4/30/2026

My application was a bit more involved. After ordering those suspension parts, I discovered that all the centerbolts had been sheared off in all four springs. So I needed to order upgrades. I went with 8,000 pound springs which were the most I could get without changing anything else. Being a bit too heavy at the time gave me a chance to see how the rig reacted. And that was perfectly. But for me it was a combined test, so I cant say which one made the difference. I do know that now that my weight situation is resolved, the rig pulls better than it did new. But it now has new tires, rims, brakes, bearings, upgraded springs, and the helpers on it as well.