Suspension Enhancement for 2022 GMC Sierra 2500 AT4

Updated 10/27/2025 | Published 03/18/2025

Products Featured in This Question

Timbren Suspension Enhancement System - Severe Service - Rear Axle

(844)

$398.07

Firestone Ride-Rite Air Helper Springs - Double Convoluted - Rear Axle

(3015)

$667.55

Timbren Rear Suspension Enhancement System

(6327)

$269.36

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

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

Firestone Air Bags
(click to enlarge)

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.