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 MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 827 (POWER SEAT SYSTEM)REPAIR INSTRUCTIONSSEAT ADJUSTER MOTOR REPLACEMENT - FRONTREMOVAL PROCEDURE
1999 GMC Forward Control 5.7 R, Automatic
Removal Procedure
1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal Procedure
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the front seat. Refer to Seat Replacement - Front Bucket .
- Disconnect the 3 electrical wiring harness connectors from the seat adjuster motors.
- If equipped, remove the push-in retainer (2) and tab (1) on the power lumbar harness from the motor bracket.
- Remove the nut from the seat adjuster motor bracket.
- Disconnect the drive cables from the seat adjuster motors. Refer to Drive Cable Replacement - Horizontal and Vertical .
- Remove the seat adjuster motor assembly from the front seat adjuster.
RENDER: 1.0x
NO RELATED
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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.