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
Power Windows Inoperative - All
POWER WINDOWS INOPERATIVE - ALL
DIAGNOSTIC AIDS
- If the PWR WDO circuit breaker cycles, the cause could be one of the following:
- A short to ground in the RAP fuse supply voltage circuit
- A short to ground in one of the power window signal or power window motor control circuits-This would cycle the PWR WDO circuit breaker with a switch activation.
- The WIN RAP relay supplies voltage to the power window system anytime the ignition is in the Accessory or RUN position and also during retained accessory power (RAP) mode. If voltage is not available to the PWR WND circuit breaker, the cause could be any of the following:
- The presence of DTC B1477 or B1478 in the BCM
- The WIN RAP relay battery supply voltage circuit is open or shorted to ground
- The WIN RAP relay ground circuit is open
- A faulty WIN RAP relay
Test
Step 1 - Step 13:
Factory Service Tools
Use the Manual With the Right Hardware
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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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