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GM Buick, Oldsmobile, Pontiac, Full-Size 1975-1990 Wiring Diagrams Repair Guide

Access our free Wiring Diagrams Repair Guide for GM Buick, Oldsmobile, Pontiac, Full-Size 1975-1990 through AutoZone Rewards. These diagrams include:

  • Fig. 1: 1975 and 1976 Buick Estate wagon
  • Fig. 2: 1975 and 1976 Buick Electra
  • Fig. 3: 1975 and 1976 Buick LeSabre
  • Fig. 4: 1977 to 1979 Buick Estate wagon
  • Fig. 5: 1977 Buick Electra
  • Fig. 6: 1977 Buick LeSabre
GM Buick-Oldsmobile-Pontiac-Full-Size 1975-1990 Wiring Diagrams Repair Guide

Access our GM Buick, Oldsmobile, Pontiac, Full-Size 1975-1990 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 My Vehicles.
  • Enter your vehicle details.
  • Click the “View More” button, and then click “Vehicle Repair Guides.”
  • Select “Chassis Electrical” in the Table of Contents.
  • Select the chapter “Wiring Diagrams Repair Guide”.

Advice, how-to guides, and car care information featured on AutoZone.com 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.

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