Buy 2017 Gmc Sierra 2500 HD 6.0L Vortec V8 FLEX A/T RWD Base Extended Cab Pickup Fleetside Coil Spring - OEM Gmc Part # 15654886

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

Coil Spring Damper

1995-00, front, w/o dual wheels. 1995-00, rear. Front, w/o dual wheels. Rear.
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 2017 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.