1991 GMC Light Duty Truck Fuel and Emissions Service Manual

C K Pickup Truck 1500 2500 3500 (1/2, 3/4 & 1 ton Sierra), Full Size Jimmy, S-15 & K-15 Truck & Jimmy | R/V Pickups (Wing Window Models), R1500, R2500, R3500, V1500, V2500, V3500, Full Size K5 Blazer, Suburban, G Vans (Rally, Vandura, Magnavan), P Models (Value Van, Forward Control Chassis, Motorhome Chassis, PG Cutaway Chassis) | 2.5 L4, 2.8L V6, 4.3L V6, 5.0L V8, 5.7L V8 & 7.4L V8 Gasoline Engines

Fuel Injected Gas Engines Only | General Motors Corporation

Fuel Emission Diagnostics * Drivability Symptoms * Fuel Control * Evaporative Emission Control * Ignition Systems *  Transmission Controls

This is the Official Service Manual that the dealers and shops use. This manual covers the entire fuel and emissions systems including specifications, diagnosis and testing and in vehicle repairs. A must for anyone who insists on Genuine OEM quality parts. Approx. 375 pages.

Condition

Good usable condition. Covers show some soiling. All pages are in place and straight. Paged edges are soiled. Page surfaces are mostly clean.

Topics Include:

• Drivability Symptoms
• Computer Command Control
• Fuel Control
• Evaporative Emission Control
• Ignition System/EST
• Electronic Spark Control
• Air Management
• Exhaust Gas Recirculation
• Transmission Controls
• Positive Crankcase Ventilation
• Thermostatic Air Cleaner
• Special Tools and Specifications