Rear Suspension Enhancement For 2015 Chevy Silverado 2500HD With Air Bag Kit

Updated 10/30/2025 | Published 02/05/2025

Products Featured in This Question

Air Lift Air Shock Controller Compressor System for Air Shock Absorbers - 100 psi

(67)

$157.41

SuperSprings Custom Suspension Stabilizer and Sway Control Kit - Factory Leaf Springs Above Axle

(62)

$794.98

Question:

Question for advice I have a 2015silverado,2500hd And a 5th wheel,pin weight 1820 I installed airbags,helps to get level, going over dips and rough roads,it want porpoise,frt and back up down, thought about changing the rear leaf spring to 3500 set,wat would you advise?thank you

asked by: Leonard C

Expert Reply:

Hello Leonard, thanks for reaching out. With that heavy of a trailer, the porpoising you mentioned is likely due to your trucks suspension flexing. So beefing up the rear suspension should definitely help reduce the excessive movement. Something like the SuperSprings Custom Suspension Stabilizer and Sway Control Kit # SSA13MXKT will be a great option for you. They have 3,000 lb capacity so this will add a lot of additional support to the rear end. They are a pretty easy add on too. Just keep in mind these will not fit vehicles with factory top overload springs. Also, you will need to special order longer u-bolts from SuperSprings if your spring stack height is greater than 2-3/4" at the axle.

Feel free to reply below with any questions.

expert reply by: Jesse M

Jesse M.

10/30/2025

Hey Leonard, how did things go after adding the SuperSprings kit to your Silverado? Did it help smooth out the porpoising when towing your fifth wheel? Your update could make it easier for others dealing with the same issue.