Suspension Enhancement for 2022 GMC Sierra 2500 AT4

Question

Question:

Looking for best setup for my GMC 2500HD AT4 to help with hitch pin weight on 5th Wheel RV. From what I’m reading my truck is good for 2750. The 5th wheel I’m looking at is closer to 3000 pin weight. Would this part TGMRTT35D work or should I look at air bags instead?

asked by: Tim

0

Expert Reply:

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 adjustable, and won't impact unloaded ride quality, air bags like the Firestone # F2613 are the way to go.

expert reply by: Robin H

0

Firestone Air Bags
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Robin H.

10/27/2025

Hey Tim, how did things turn out with your GMC 2500HD AT4 and the 5th wheel setup? Did you end up going with the air bags or one of the Timbren options? Your experience could point others in the right direction.

Tim

10/27/2025

@RobinH just ordered the Timbren bump stops to see how they will work out. I’ll let you know once I get them on and tow my RV

Answer 1

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…

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Answer 2

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…

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Answer 3

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…

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Answer 4

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…

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Answer 5

Hey Jason, thanks for reaching out! The RoadActive Suspension Custom Leaf Spring Enhancement Kit #RAS3611-CHD can be used with the Timbren Kit #TGMRTT35D, but one will make the other kind of pointless to use. The RoadActive will work well for…

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Answer 6

Hey Jim, congrats on the new truck. I would strongly advise staying away from the Severe Service Timbren Suspension Enhancement System item #TGMRTT35D. You're really going to feel those when you're driving around without your camper. Those…

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Answer 7

I definitely recommend the Timbren springs over the Stableloads. I reached out to my contact at Timbren about the differences between the rear suspension models for your 2016 Chevrolet 3500 4WD and he said that the Timbren Rear Suspension Enhancement…

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Answer 8

The Timbren Rear Suspension Enhancement System #TGMRCK25D is 5-1/4" tall x 4-1/4" wide. The height is 6-1/4" with the included spacer. This is confirmed to fit your 2024 Sierra 3500.

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Answer 9

Yes, it will work. You'll just need to cut the Lance 6-pin connector out and rewire it into the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector item #e99011. Here are the individual functions of that Lance 6-pin:…

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Answer 10

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…

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Answer 11

Once installed, the double convoluted springs from the Timbren SES Kit, #TGMRCK25D, will sit 5-3/16 inches below the jounce bumper holder on the frame. The outer diameter of these springs is 4-5/16 inches. The single convoluted springs from the…

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Answer 12

To help suspend payload carried in the truck's bed, I'd recommend using #TGMRCK25D, which are rated up to 8600 lbs. Keep in mind, these will NOT increase the manufacturer's stated suspension capacity. For a slide-in camper or salt…

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Suspension Enhancement for 2022 GMC Sierra 2500 AT4

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