2008 GMC Envoy Service and Repair Manual

This factory service and repair manual for the 2008 GMC Envoy documents a four-door sport utility offered in Denali, SLE and SLT trim, with a choice between the naturally aspirated 4.2L DOHC inline-six and the 5.3L OHV V8. Both are gasoline engines and both get their own mechanical, cooling, fuel and emissions coverage. Around them the manual sets out the transmission and transfer case, suspension and steering, hydraulic brakes, heating and air conditioning, restraints and the body circuits, each with procedures, specifications, torque values and diagnostics.

Engines covered

• 4.2L inline-six (256 cu in) — DOHC, naturally aspirated, gasoline
• 5.3L V8 (325 cu in) — OHV, naturally aspirated, gasoline

Body styles covered

• 4-door sport utility

Trims covered

• Denali
• SLE
• SLT

Known issues on the 2008 Envoy. Seventy-seven owner complaints are logged with NHTSA on this model year, with exterior lighting first, the electrical system next and engine cooling behind them. Lighting is a wiring and grounding problem as often as a bulb problem, and this manual supports that work with circuit diagrams, connector views and voltage drop testing procedures. Cooling system coverage runs from thermostat and water pump replacement through pressure testing, with the specifications and torque values for every fastener involved on either engine.