Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGMC1991JIMMY 5.7 K, AUTOMATIC, 4L60/MD8REPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEPOWER WINDOWS - R/V SERIES PICKUPS
1991 GMC Jimmy 5.7 K, Automatic, 4L60/MD8
Power Windows - R/V Series Pickups
1991 GMC Jimmy 5.7 K, Automatic, 4L60/MD8SECTION Power Windows - R/V Series Pickups
- Description & Operation
- Component Locations
- Trouble Shooting
- System Tests
- Notes
- Test A: Power Windows Do Not Operate Or Only Go In One Direction
- Test B: Power Windows Only Operate From Driver's Side Window Switch
- Test C: Power Windows Do Not Operate From Driver's Side Window Switch
- Test D: Tailgate Window Does Not Operate From Front Tailgate Switch
- Test E: Tailgate Window Does Not Operate From Key-Operated Tailgate Window Switch
- Removal & Installation
- Wiring Diagrams
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.