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 MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 913 (FIXED & MOVEABLE WINDOW SYSTEMS)DIAGNOSTIC INFORMATION AND PROCEDURESPOWER WINDOW LOCKOUT FUNCTION INOPERATIVECIRCUIT/SYSTEM TESTING
2006 Chevrolet Suburban C2500, 6.0 U
Circuit/System Testing
2006 Chevrolet Suburban C2500, 6.0 USECTION Circuit/System Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Power Window Lockout Function Inoperative
- Install a scan tool and display the Driver Door Switch Inputs data list.
- Ignition on, verify that the window lockout switch parameter displays On only while the lockout switch is pressed.
- If the switch parameter is incorrect, replace the DDS.
- Display the Body Control Module Doors data list.
- Verify that the LR and RR Window Enable Command parameters change form On to Off when the lockout function is activated.
- If the enable command parameters are incorrect, replace the BCM.
- Disconnect the affected rear door power window switch connector, and activate the rear window lockout function.
- Verify that a test lamp does not illuminate when connected from the lockout signal circuit terminal to ground.
- If the test lamp illuminates, test the lockout signal circuit for a short to voltage. If the circuit tests normal replace the BCM.
- If the circuits test normal replace the affected rear door power window switch.
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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.