1992 GMC Sierra Natural Gas Powered Service Shop Repair Manual Supplement. Original.

This service manual supplement contains service, fuel and emissions, and electrical diagrams and diagnosis information specific to the Natural Gas Powered Sierra.
Service manual information not specific to the Natural Gas Powered Sierra is covered in the 1992 Service Manual for Sierra, Yukon, Suburban, Crew Cab and 3500 HD Models (NOT Included).
Fuel and emissions information not specific to the Natural Gas Powered Sierra is covered in the 1992 Light Duty Truck Fuel and Emissions Manual (NOT Included).
Unit repair information not specific to the Natural Gas Powered Sierra is covered in the 1992 Light Duty Truck Unit Repair Manual (NOT Included).
Wiring diagrams and electrical diagnosis information not specific to the Natural Gas Powered Sierra is covered in the 1992 Electrical Diagrams and Diagnosis Manual (NOT Included).

Contents:
Part 1 Service Manual Supplement

General Information
Suspension
Engine
Transmission

Part II Fuel and Emissions Manual Supplement

General Information
Driveability 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
Abbreviations

Part III Electrical Diagrams and Diagnosis Manual Supplement

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 neer 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.