This factory service and repair manual for the 2001 GMC T6500 deals with a medium-duty truck offered under a single chassis designation, F6B042, and powered by one of two turbocharged inline-six diesels. The smaller is a 7.2L of 441 cubic inches with an overhead-valve layout; the larger is a 7.8L of 475 cubic inches. Both are documented in full, with their own specifications, torque values and diagnostic sequences, and the driveline, brakes, steering, chassis and body procedures follow in the same system order.
Engines covered
- 7.2L inline-six (441 cu in) — OHV, turbocharged, diesel
- 7.8L inline-six (475 cu in) — turbocharged, diesel
Trims covered
- F6B042
Known issues on the 2001 T6500. Nothing is recorded against this model year on the federal side: no recalls, and no owner complaints logged with NHTSA. What remains is the working content — the two turbocharged diesel sixes at 7.2 and 7.8 liters, with specifications and torque values for each, plus the brake, steering, driveline, chassis and body procedures and the wiring diagrams and diagnostics that go with them. That is the material a shop leans on when no pattern of known faults shortens the diagnosis.
