2007 GMC Sierra 3500 Classic Service and Repair Manual
This factory service and repair manual for the 2007 GMC Sierra 3500 Classic covers the carryover truck in full, five bodies from crew cab and extended cab pickups through 4-door and 2-door cab and chassis to a 2-door standard cab pickup, in SL, SLE, SLT and WT trim. Three overhead-valve V8s remain: the 6.6L turbocharged diesel of 403 cubic inches, the 6.0L gasoline of 364 cubic inches and the 8.1L gasoline of 496 cubic inches. Specifications, torque values, wiring diagrams and diagnostics are given for each.
Engines covered
- 6.6L V8 (403 cu in) — OHV, turbocharged, diesel
- 6.0L V8 (364 cu in) — OHV, naturally aspirated, gasoline
- 8.1L V8 (496 cu in) — OHV, naturally aspirated, gasoline
Body styles covered
- 4-door crew cab pickup
- 4-door extended cab pickup
- 4-door cab & chassis
- 2-door cab & chassis
- 2-door standard cab pickup
Trims covered
- SL
- SLE
- SLT
- WT
Known issues on the 2007 Sierra 3500 Classic. Three recalls are on the federal record. Two of them concern the passenger frontal air bag inflator, which can rupture once its propellant has degraded and send metal fragments into the cabin. The third concerns trucks fitted with an auxiliary battery, where excess current through the trailer harness can melt a fusible link, damage the electrical center cover and nearby conduit, and raise a fire risk. Sixteen owner complaints are logged, seven on air bags and pairs on service brakes and the engine. Restraint diagnostics, trailer wiring diagrams and engine procedures with their torque values are all in this manual.
