Door Locks - Loss of Power Door Lock Function
TECHNICALBulletin No.: 12-08-64-001
Date: May 15, 2012
Subject: Loss of Power Door Lock Function on One or Several Doors (Repair Door Lock Knob Interference)
Models:
2008-2013 Cadillac Escalade, Escalade ESV, Escalade EXT
2007-2013 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2007-2013 GMC Sierra, Sierra Denali, Yukon, Yukon Denali, Yukon XL, Yukon Denali XL
Condition
Some customers may comment that one or more of the doors do not lock/unlock when activating the power door locks. The condition can either be intermittent or all the time.
Cause
The cause of this condition may be that the door locking button is hanging up on the window belt inner sealing strip within the door. The inboard seal material may rub on the button causing the button to hang-up on the sealing strip. This condition can happen in either the unlock or lock position.
Correction
Important
It is not necessary to remove the door trim panel to diagnose or repair this condition.
1. First verify the condition by removing the door locking rod knob on the affected door following the steps below:
1. Ensure the locking rod is in the unlocked position.
2. Use a flat-bladed tool to disengage the detent tab and then remove the knob (1) by pulling upward.
2. Verify interference of the door lock button to the sealing strip by visually inspecting the area behind the button for sealing strip material (1) protruding into the door lock button area. An example of this condition is shown in the graphic above.
3. On the door exhibiting this interference, use a trim stick, or suitable tool, to reposition the sealing strip to the outboard side of the down-standing tab.
4. When repositioned, the tab/seal interface should look like the example in the graphic above.
5. Reinstall the locking rod knob (1) following the steps below:
1. When re-installing the locking rod knob, push the knob down until the detent tab touches the locking rod opening cover.
2. Push the detent tab in to lock the knob to the locking rod.
3. Ensure proper travel of the locking rod knob.
Warranty Information
For vehicles repaired under warranty, use the table.
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