This Fits Your 2015 GMC Sierra 2500 HD Base Extended Cab Pickup 6.6L Duramax V8 DIESEL A/T RWD
Full size assembly image of REAR SUSPENSION. AXLE HOUSING. (1/1)

REAR SUSPENSION. AXLE HOUSING.

11. 50 ring gear. 6. 6 ft box. 8 ft box. Crew cab. Double cab. Regular cab. W/DUAL rr wheels. W/O dual rr wheels.