Body - Rearview Mirrors Blow In At Highway Speeds
Bulletin No.: 03-08-64-010CDate: June 18, 2007
TECHNICAL
Subject:
Outside Rearview Mirrors May Blow In At Highway Speeds or Power Folding Feature Appears Inoperative (Synchronize Mirrors)
Models:
2002-2006 Cadillac Escalade, Escalade EXT
2003-2006 Cadillac Escalade ESV
2003-2006 Chevrolet Avalanche, Suburban, Tahoe
2003-2007 Chevrolet Silverado (Classic)
2003-2006 GMC Yukon, Yukon XL
2003-2007 GMC Sierra (Classic)
2003-2006 HUMMER H2
Supercede:
This bulletin is being revised to add the 2007 Classic Pickup models. Please discard Corporate Bulletin Number 03-08-64-010B (Section 08 - Body and Accessories).
Condition
Some customers may comment that the power fold feature of the mirrors either does not operate properly or that the mirrors may blow back toward the closed position at highway speeds.
Cause
Manually folding the mirror may cause the mirror and the motor to become out of sync.
The power mirror drive has detents in the drive hub that lock the mirror to the drive system. This system is designed to let the drive hub disconnect without damage through manual input to the mirror. This mechanism allows the mirrors to be folded by power but still have the break-a-way feature if contacted accidentally.
Correction
There are no replacement parts necessary to correct this condition. The mirrors will self-synchronize by following the procedure below. Once synchronized, the mirrors will function properly unless folded manually.
Prior to replacing a mirror, attempt to electrically fold and unfold the mirrors a minimum of 3 cycles.
Set the power mirror selector switch to the center position. You will see the mirror directional control switch illuminate the power folding symbol.
Press the right or left side of the directional control to fold or unfold the mirrors.
Cycle the mirrors open and closed 3 times. The mirrors should now operate normally.
Please advise the customer of the above procedure for future reference or provide them with a copy of this bulletin.
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