1991 GMC Light Truck S/T Models Service Shop Repair Manual. (Sonoma/S-15 Jimmy) Original.
This service manual contains diagnosis, on-vehicle maintenance and light repair for Light Duty Truck Models S-Truck. Fuel and emissions related components for throttle body injection vehicles are covered in a separate manual (that is what it states, but on the contents listing it mentions Fuel and Emissions for Gasoline Engines with Throttle Body Injection is the last section of this manual, which it is). Procedures involving disassembly and assembly of major components for these vehicles are published in a separate Truck Unit Repair Manual (NOT Included). Wiring diagrams and electrical diagnosis for these models are also published in a separate Electrical Diagrams and Diagnosis Manual (NOT Included).
Contents for S-Truck Light Duty Truck Service Manual:
Heating and Air Conditioning
Frame and Cab
Steering, Suspension, Wheels and Tires
Propeller Shaft and Axle
Transmission and Clutch
Last Section of This Manual - Fuel and Emissions for Gasoline Engines with Throttle Body Injection
This Service Manual replaces Section 6C and 6E for the 2.5L, 28.L, and 4.3L gasoline engines with throttle body injection and supplements the following shop manual: X-9129 (which is at the front of this manual)
Contents for S,T-Truck Light Duty Truck Fuel and Emissions Service Manual for Gasoline Engines with Throttle Body Injection Service Manual:
Computer Command Control
Evaporative Emission Control
Electronic Spark Control
Exhaust Gas Recirculation
Automatic Transmission Converter Clutch and Manual Transmission Shift Light
Positive Crankcase Ventilation
Thermostatic Air Cleaner
Special Tools and Specifications
Note: Service manuals can be valuable tools when working on and/or restoring a vehicle. For the uninitiated, keep in mind that these manuals were never meant as restoration manuals, as that is not within the regular scope of work done by dealership service departments (even today).
Condition: Service Manuals are used in Dealership Shops, Independent Garages and in Fleet Environments and thus can reflect such use, most often showing extensive signs of soiling, age, and wear. The information within is still legible and can give valuable insight. The images shown are representative of what is shipped.
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