2002 GMC Sonoma Service and Repair Manual

This factory service and repair manual for the 2002 GMC Sonoma covers the truck in SL and SLS trim, built as a four-door crew cab pickup, a three-door extended cab pickup or a two-door standard cab pickup. Two naturally aspirated overhead-valve engines are in scope: a 2.2L inline-four of 134 cubic inches running flex-fuel, and a 4.3L V6 of 262 cubic inches on gasoline. Procedures, specifications, torque values, wiring diagrams and diagnostics are organized by system, so a job on either engine reads the same way.

Engines covered

• 2.2L inline-four (134 cu in) — OHV, naturally aspirated, flex-fuel
• 4.3L V6 (262 cu in) — OHV, naturally aspirated, gasoline

Body styles covered

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

Trims covered

• SL
• SLS

Known issues on the 2002 Sonoma. Fifty-seven owner complaints are logged with NHTSA against this model year. Service brakes draw the most at sixteen, followed by structure at thirteen and the electrical system at five. Those are precisely the areas this manual works through in detail: hydraulic brake overhaul, bleeding and antilock diagnostics; body, frame and cab hardware procedures with their torque values; and wiring diagrams tracing power distribution, grounds and circuits through both the four-cylinder and V6 trucks.