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.
2007 Chevrolet Express 1500 RWD V6-4.3LFACTORY OEM SERVICE PROCEDURE
Seats: Description and Operation
POWER SEATS SYSTEM DESCRIPTION AND OPERATION
POWER SEAT SYSTEM COMPONENTS
The power seat system for the driver and passenger consists of the following components:
- Power Seat Switch
- Seat Horizontal Motor
- Seat Front Vertical Motor
- Seat Rear Vertical Motor
POWER SEAT SYSTEM OPERATION
This seat contains three motors for positioning. They are the Horizontal motor, Rear Vertical motor, and a Front Vertical motor The Horizontal motor moves the seat forward and rearward. The Front Vertical motor raises and lowers the front of the seat and the Rear Vertical motor raises and lowers the rear of the seat. Power is supplied to the motors through a battery positive voltage supply circuit at the Power Seat Switch. A ground circuit is supplied to the motors through the Power Seat Switch also.
The direction the motor operates depends on the polarity applied to the motor control circuits. Each time direction is changed using the power seat switch, the power and ground paths are reversed at the control circuits causing the motor to position the seat in the desired direction.
Factory Service Tools
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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.
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