06-08-64-027K Mirror Housing and or Mirror Glass Shake Flutter Vibration – Power Outside Rearview OSRV Left Right (Perform Repairs As Outlined) - (Aug 7 2012)
|Subject:||Mirror Housing and/or Mirror Glass Shake, Flutter, Vibration – Power Outside Rearview,OSRV, Left, Right (Perform Repairs as Outlined)|
|Models:||2007-2013 Cadillac Escalade, Escalade ESV, Escalade EXT|
|2007-2013 Chevrolet Avalanche, Silverado, Suburban, Tahoe|
|2007-2013 GMC Sierra, Yukon, Yukon XL, Yukon Denali, Yukon Denali XL|
|Equipped with Power Outside Rearview Mirror (RPOs DL3, DL8, DPN)|
This bulletin is being revised to add the 2013 model year and update the Condition,Cause and Correction information. Please discard Corporate Bulletin Number 06-08-64-027J(Section 08 – Body and Accessories).Condition 1
Some customers may comment that the outside rearview mirror (OSRVM) housing and glassshakes, flutters or vibrates while driving. This may be noticeable at any speed withslight road input.Cause 1
For power folding mirrors only, the mirror may have been manually folded or unfolded,or obstructed while power folding, possibly causing the folding mechanism to becomeout of sync.Correction 1
Perform a road test of the vehicle to determine whether the customer’s concern isrelated to mirror housing movement (Condition 1) or mirror glass movement (Condition2) then proceed with the appropriate repair procedure.
Note:A popping noise may be heard during the resetting of the mirror power fold mechanisms.This sound is normal after a manual fold and/or unfold has occurred.Cycle the mirrors through three complete power fold and unfold events. This will causea relearn of the mirror positions and a reset of the power fold mechanisms.Perform a road test and inspect the mirror housing and mirror glass for stability.If stability of the mirror housing is not corrected, the mirror assembly must be replaced.If stability of the mirror housing has been corrected, but the mirror glass exhibitsa shake, flutter or vibration, proceed to Correction 2.Condition 2
Some customers may comment that the outside rearview mirror (OSRVM) glass shakes,flutters, or vibrates while driving. This may be most noticeable at freeway speeds.Cause 2
For all power glass adjustment mirrors, one or more of the following items may bethe cause of the mirror glass shake, flutter or vibration:The motor/actuator assembly to mirror housing mounting screws may be loose, allowingthe actuator assembly to move in relation to the mirror housing.The motor/actuator housing cover retaining screws may be loose, allowing the actuatoradjustment arms to exhibit excessive looseness.The mirror glass anti-rattle springs may not have enough tension against the mirrorhousing.Correction 2
Perform a road test of the vehicle to determine whether the customer’s concern isrelated to mirror housing movement (Condition 1) or mirror glass movement (Condition2), then proceed with the appropriate repair procedure.
Important:DO NOT replace the motor/actuator assembly for this concern.
Remove the affected OSRV mirror glass (2) from the motor/actuator assembly (1). Referto Outside Rearview Mirror Glass Replacement in SI.