Question about 2002 GMC Sierra

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The left front window and unlock lock buttons do not work

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It is very possibly that the wires for these have broke in the harness that is in between the door and the body pillar . If you can remove the switches for the lock and the window switch with out to much trouble . test the circuits with a test light and make sure there is power and ground to them . If there is no power and ground check your fuses if they are all good then check the harness between the door and pillar . if there is power to the switches you will need to remove the door panel and check to see if power is going to the window motor and the actuator for the door locks , if there is power then the motor and the actuator will need to be replace . If there is no power then its possibly the witches or wiring from the switch to the motor or actuator

Posted on Apr 07, 2011

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