GMC: 2021: Sierra 3500 HD Base, 2D Pickup, 6.6L Eng VIN 7, RWD, Gas

This is a LEMON manual, retrieved in 2025.

• Repair and Diagnosis
• Repair and Diagnosis, all links on one page (may load slowly, but easier to search)
• Labor Times
• Download .zip for offline use

This manual is identical to the manual for the following model variants, except for possibly the "Labor Times", "Fluids", and "Tire Fitment" pages:

• Sierra 3500 HD Base, 2D Cab Chassis, 6.6L Eng VIN 7, RWD
• Sierra 3500 HD Base, 4D Cab Chassis, 6.6L Eng VIN 7, RWD
• Sierra 3500 HD Base, 4D Pickup Crew Cab, 6.6L Eng VIN 7, RWD, Gas
• Sierra 3500 HD Base, 4D Pickup Extra Cab, 6.6L Eng VIN 7, RWD, Gas
• Sierra 3500 HD Base, 2D Pickup, 6.6L Eng VIN 7, RWD, Gas/Ethanol
• Sierra 3500 HD Base, 4D Pickup Crew Cab, 6.6L Eng VIN 7, RWD, Gas/Ethanol
• Sierra 3500 HD Base, 4D Pickup Extra Cab, 6.6L Eng VIN 7, RWD, Gas/Ethanol
• Sierra 3500 HD SLE, 2D Cab Chassis, 6.6L Eng VIN 7, RWD
• Sierra 3500 HD SLE, 2D Pickup, 6.6L Eng VIN 7, RWD
• Sierra 3500 HD SLE, 4D Cab Chassis, 6.6L Eng VIN 7, RWD
• Sierra 3500 HD SLE, 4D Pickup Crew Cab, 6.6L Eng VIN 7, RWD
• Sierra 3500 HD SLE, 4D Pickup Extra Cab, 6.6L Eng VIN 7, RWD
• Sierra 3500 HD SLT, 6.6L Eng VIN 7, RWD