2009 Chevrolet Trailblazer Service and Repair Manual

This factory service and repair manual for the 2009 Chevrolet Trailblazer covers a shortened lineup: two trims, LT and SS, and two engines, the 6.0L overhead-valve V8 of 364 cubic inches and the 4.2L twin-cam inline-six of 256, both naturally aspirated and both on gasoline, in the four-door sport utility body. The contrast between a pushrod V8 and a twin-cam six runs through the engine chapters, with different timing methods, different torque sequences and different diagnostic values, and the manual documents each on its own terms.

Engines covered

• 6.0L V8 (364 cu in) — OHV, naturally aspirated, gasoline
• 4.2L inline-six (256 cu in) — DOHC, naturally aspirated, gasoline

Body styles covered

• 4-door sport utility

Trims covered

• LT
• SS

Known issues on the 2009 Trailblazer. Twenty-eight complaints are on the federal record for this year, a small number spread thinly: nine on the electrical system, nine on exterior lighting, four on air bags. Lighting and electrical faults on a truck this age usually come down to connectors, grounds and corroded terminals, and the wiring diagrams here are drawn to be followed to that level. The air bag material covers diagnosis and the precautions for working around live circuits, and the rest of the manual carries the engine, driveline and chassis specifications.