2007 GMC Sierra 2500 HD Service and Repair Manual

This factory service and repair manual for the 2007 GMC Sierra 2500 HD arrives after the big-block option has gone, which leaves two engines: the 6.6L turbocharged diesel V8 of 403 cubic inches and the naturally aspirated 6.0L gasoline V8 of 364 cubic inches, both overhead-valve. Three cabs are covered, a 4-door crew cab pickup, a 4-door extended cab pickup and a 2-door standard cab pickup, in SLE, SLT or WT trim. Procedures, specifications, torque values, wiring diagrams and diagnostics follow each engine and body through the manual.

Engines covered

• 6.6L V8 (403 cu in) — OHV, turbocharged, diesel
• 6.0L V8 (364 cu in) — OHV, naturally aspirated, gasoline

Body styles covered

• 4-door crew cab pickup
• 4-door extended cab pickup
• 2-door standard cab pickup

Trims covered

• SLE
• SLT
• WT

Known issues on the 2007 Sierra 2500 HD. Three recalls are on the federal record. Two of them concern the passenger frontal air bag inflator, which can rupture as its propellant degrades and throw metal fragments into the cabin during deployment. The third concerns trucks with an auxiliary battery, where too much current drawn through the trailer harness can melt a fusible link, damage the wiring conduit around it and raise a fire risk. Owners have filed 83 complaints, 46 of them on air bags, with small groups on service brakes and the electrical system. Restraint system and wiring diagnostics, with the harness routing behind them, are covered here.