GM Full-Size Trucks 1988-1998 Wiring Diagrams Repair Guide

Access our free Wiring Diagrams Repair Guide for GM Full-Size Trucks 1988-1998 through AutoZone Rewards. These diagrams include:

Get Your GM Truck Back on the Road

Your Chevy or GMC truck is a sophisticated vehicle: a collection of expertly designed systems and components that enable it to deliver the performance, power, and safety you rely on. As a DIYer, you appreciate the care and caution with which you must approach your maintenance, repair and upgrade projects. You know that AutoZone is a trusted source for aftermarket components and accessories, including the spark plugs and other electrical parts you need for your project. We’re also the top destination for DIYers for advice, how-tos and expert guidance. These GM wiring diagrams provide schematics for vehicle model years 1988 through 1998.

  • Fig. 1: Index of Wiring Diagrams
  • Fig. 2: Sample Diagram: How to Read and Interpret Wiring Diagrams
  • Fig. 3: Wiring Diagram Symbols
  • Fig. 4: 1988-98 GM-C/K Series Wiring Schematic
  • Fig. 5: 1988-98 GM-C/K Series Wiring Schematic
  • Fig. 6: 1988-90 GM-R/V Series Wiring Schematic
GM Full-Size Trucks 1988-1998 Wiring Diagrams Repair Guide

Get to Know Your Truck’s Wiring

Typical electrical problems include bad batteries, alternators, and starters, along with blown fuses and bad battery cables. Some wiring system issues are more complex, however: open circuits, short circuits, erosion, repeated blowing fuses, or hot smells from wires or melting plastic. These are obviously serious and can put your truck out of commission, possibly for good. You require accurate information to find and fix the fault right away. Use our 1988 K1500 wiring diagram and other schematics as guides while you’re troubleshooting the problem or determining what you need to buy. And best of all, you’re already in the right place to find the electrical components to complete the job.

Access our GM Full-Size Trucks 1988-1998 Wiring Diagrams Repair Guide by creating an account or signing into your AutoZone Rewards account. Once you sign in, follow these instructions to access our Repair Guides.

  • Add your vehicle in Manage My Vehicles.
  • Enter your vehicle details.
  • Click the “View More” button, and then click “Vehicle Repair Guides.”
  • Select the chapter ” Wiring Diagrams Repair Guide”.

Your Destination for GM Truck Parts

We hope you found the 1995 Chevy G20 wiring diagrams and other schematics helpful. When you’re ready to start your project, count on AutoZone’s large selection of auto parts and accessories by Autolite, Bosch, NGK, Duralast, Blue Streak, ACDelco, and other respected industry manufacturers. Get your spark plugs, ignition switches, mass air flow sensor and everything else with speedy shipping options or choose our convenient in-store pickup option. Need specialty tools for your project? Borrow them for up to 90 days through our Loan-A-Tool service.

Advice, how-to guides, and car care information featured on and AutoZone Advice & How-To’s are presented as helpful resources for general maintenance and automotive repairs from a general perspective only and should be used at your own risk. Information is accurate and true to the best of AutoZone’s knowledge, however, there may be omissions, errors or mistakes.

Be sure to consult your owner’s manual, a repair guide, an AutoZoner at a store near you, or a licensed, professional mechanic for vehicle-specific repair information. Refer to the service manual for specific diagnostic, repair and tool information for your particular vehicle. Always chock your wheels prior to lifting a vehicle. Always disconnect the negative battery cable before servicing an electrical application on the vehicle to protect its electrical circuits in the event that a wire is accidentally pierced or grounded. Use caution when working with automotive batteries. Sulfuric acid is caustic and can burn clothing and skin or cause blindness. Always wear gloves and safety glasses and other personal protection equipment, and work in a well-ventilated area. Should electrolyte get on your body or clothing, neutralize it immediately with a solution of baking soda and water. Do not wear ties or loose clothing when working on your vehicle.

FREE Loan-A-Tool® program requires returnable deposit. Please note that the tool that you receive after placing an online order may be in a used but operable condition due to the nature of the Loan-A-Tool® program.

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