2013 GMC Sierra 2500 HD Service and Repair Manual

This factory service and repair manual for the 2013 GMC Sierra 2500 HD returns CNG to the gasoline V8's description, so the 6.0L overhead-valve V8 of 364 cubic inches is listed for gasoline, CNG or flex fuel, and the 6.6L turbocharged diesel V8 of 403 cubic inches sits beside it. Denali, SLE, SLT and WT trims were sold on a 4-door crew cab pickup, a 4-door extended cab pickup or a 2-door standard cab pickup. Fuel, engine and chassis procedures, with their specifications, torque values, wiring diagrams and diagnostics, follow each variation.

Engines covered

• 6.6L V8 (403 cu in) — OHV, turbocharged, diesel
• 6.0L V8 (364 cu in) — OHV, naturally aspirated, gasoline or CNG or flex-fuel

Body styles covered

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

Trims covered

• Denali
• SLE
• SLT
• WT

Known issues on the 2013 Sierra 2500 HD. Three recalls are on the federal record. A fire extinguisher supplied with the truck can clog and fail to discharge. The other two describe frontal air bag inflators that may explode when the propellant inside degrades, sending metal fragments toward the driver and passengers. Owners have filed 85 complaints, 13 of them on the air bags, 10 on steering and nine on the power train. The manual answers those with restraint module and sensing diagnostics, steering gear and hydraulic assist procedures, and the transmission and driveline sections, each with the specifications and torque values they require.