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.
Circuit/System Verification
2009 Chevrolet Tahoe Base, 4.8 CSECTION Circuit/System Verification
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON, observe the scan tool BCM Rear Closure Ajar Sw. parameter while opening and closing the liftgate and liftgate window. The reading should change between Active and Inactive.
- If not the specified values refer to Liftgate/Liftgate Window Ajar Indicator Malfunction (w/o E61) or Liftgate/Liftgate Window Ajar Indicator Malfunction (with RPO E61) .
- Press and release the rear window washer switch. The rear window wiper motor and pump will operate continuously for as long as the wash switch is pressed and several wipe cycles will occur after the switch is released.
- If the rear wiper motor and the rear washer pump are inoperative, refer to the Rear Wiper Washer Switch Circuit Test below.
- If the rear washer pump operates normal and the rear wiper motor is inoperative, refer to the Rear Wiper Motor Circuit Test below.
- Operate the rear window wiper switch to DELAY, ON, and OFF. The rear window wiper motor will operate in a delayed wipe cycle mode then a continuous wipe cycle mode and stop in the park position.
- If the wiper motor is inoperative in the DELAY or ON modes, refer to the Rear Wiper Motor Circuit Test below.
- If the rear wiper stops out of the park position, replace the rear window wiper motor.
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.