1989 GMC Medium Duty Truck Fuel and Emissions Service Shop Repair Manual. Fuel Injected Gas Engines Only. Original.
This service manual replaces Sections 6C and 6E for 6.0L gasoline engines with electronic fuel injection and supplements the 1988 Medium Duty Service Manual X-8833 (NOT Included).
This manual includes the general description of a system, diagnosis and on-vehicle service procedures for the fuel control and emissions systems used on medium duty trucks with a throttle body injection fuel control system.
Wiring diagrams for the above vehicles are also published in a separate "Truck Wiring Diagram" booklet (NOT Included).
Computer Command Control
Evaporative Emissions Control
Electronic Spark Control
Exhaust Gas Recirculation
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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