Buy 2004 Gmc Sierra 2500 HD 6.0L Vortec V8 CNG M/T RWD SLT Crew Cab Pickup Coil Spring Damper. 1/2 ton Ton, Suspension, Springs - OEM Gmc Part # 15270578

Spring. Damper. Bumper.
A component (mounted in the center of the Spring) which cushions the Spring as it is compressed. seat. Auxiliary. Coil. Stopper. Vibration.

Coil Spring Damper

Fits Express 1500, Savana 1500

1/2 ton. Type 1, 1/2 ton.
Suspension Coil Spring - Repair or Replace
Your coil springs are not especially prone to failure, but if they have been cut, clamped, or heated to have the vehicle lowered, your 2004 GMC Sierra 2500 HD might benefit from replacing the strut springs. Excessive rust can make the springs more prone to failure. Contact your local GMC service department to have your suspension system evaluated.