October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.
GMC: 2003: Sierra 2500 HD, 2D Pickup, 8.1 G, 4WD, Automatic
This is a LEMON manual, retrieved in 2025.
This manual is identical to the manual for the following model variants, except for possibly the "Labor Times", "Fluids", and "Tire Fitment" pages:
- Sierra 2500 HD, 4D Pickup, 8.1 G, 4WD, Automatic
- Sierra 2500 HD, 4D Pickup Extra Cab, 8.1 G, 4WD, Automatic
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