1992 GMC Sonoma Service and Repair Manual

This factory service and repair manual for the 1992 GMC Sonoma has three engines to keep straight — the 4.3L V6 at 262 cubic inches, the 2.8L V6 at 173, and the 2.5L inline-four at 151, every one naturally aspirated and overhead-valve. The compact pickup came as a two-door standard cab or a two-door extended cab, in Base, GT or SLE trim. The manual sorts procedures, specifications, torque values, wiring diagrams and diagnostics by system, so the right figures for a given engine and body are quick to find.

Engines covered

• 4.3L V6 (262 cu in) — OHV, naturally aspirated, gasoline
• 2.8L V6 (173 cu in) — OHV, naturally aspirated, gasoline
• 2.5L inline-four (151 cu in) — OHV, naturally aspirated, gasoline

Body styles covered

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

Trims covered

• Base
• GT
• SLE

Known issues on the 1992 Sonoma. Three recalls touch this model year. Two involve fuel delivery parts supplied for service: a return line whose bleed valve was left out, and a replacement filter that seals poorly at its connection — either can weep fuel and, near an ignition source, start a fire. The third concerns four-wheel-drive trucks whose antilock brake system can be told the wrong drive mode, lengthening a stop without warning. Of 42 complaints, half name the service brakes, which is where this manual's hydraulic and antilock diagnostics earn their keep.