OBS Suspension

Browse OBS parts for suspension — lift kits, lowering kits, air ride, control arms, and steering components for 1988-1999 Chevy & GMC GMT400 trucks. Improve stance, performance, and handling on your build.

C vs K and 1500, 2500, 3500: which suspension fits?

On OBS trucks the letter is the drivetrain and the number is the weight class. C trucks (C1500, C2500, C3500) are 2WD with coil-spring front suspension. K trucks (K1500, K2500, K3500) are 4WD with torsion-bar front suspension. 1500 is a half-ton, 2500 a three-quarter-ton, and 3500 a one-ton, including duallies. Lowering kits, lift kits, control arms, and shocks are built for one combination, so match both before you order.

• C1500 / K1500 half-ton: C/K1500 lowering kits, C1500 air ride, lift kits, C1500 and K1500 control arms, C1500 and K1500 shocks.
• C2500 / C3500 2WD: C2500/C3500 lowering kits, 2500/3500 air ride, C2500 and C3500 control arms, C2500 shocks.
• K2500 / K3500 4WD: K2500/K3500 lift kits, K2500 and K3500 control arms, K2500 shocks.
• K-series 4WD front ends: wheel bearings and hubs for K1500, K2500, and K3500.

Not sure which you have? Check for a front driveshaft (K) and count your lugs, or call or text (970) 634-3577 with your year and VIN. See all OBS shocks or the steering and suspension hub.