Rearview Mirror, Outside - Vibration
Group Ref.: BodyBulletin No.: 461001
Date: April, 1994
SUBJECT:
OUTSIDE REAR VIEW MIRROR VIBRATION
(INSTALL SET SCREW FASTENER)
MODELS:
1982-93 CHEVROLET AND GMC TRUCK S/T PICKUPS
1983-94 CHEVROLET AND GMC TRUCK S/T UTILITIES WITH D44 OR D45 MIRRORS
CONDITION:
Some owners may comment that their outside rear view mirrors vibrate.
CAUSE:
Force is applied against the mirror arm by a retention spring wedged between the mirror bracket and mirror arm to prevent mirror rotation. Over time, this spring force decreases allowing the mirror arm to move or vibrate.
CORRECTION:
This condition can be corrected by drilling and tapping a hole in the retention spring to accept a set screw fastener. The fastener can be adjusted to force the spring against the mirror arm, restoring the original pressure.
SERVICE PROCEDURE:
1. From outside the vehicle, remove the screws which secure the mirror cover and the mirror assembly to the door (Figure 1).
2. Remove the mirror assembly from the door.
3. Remove the mirror head and arm from the mirror bracket.
4. Remove the retention spring from the mirror bracket (Figure 2, Item A).
5. Drill and tap the retention spring, on the rear side wing, so that it will accept a 6.0 mm X 1.0 mm (diameter X thread pitch) set screw fastener (Figure 3, Item A) (procured locally). The approximate fastener length should be 10 mm.
NOTE:
The hole must be drilled perpendicular to the flat surface of the retention spring's wing.
6. Reinstall the retention spring in the mirror bracket.
7. Reinstall the mirror head and arm to the mirror bracket.
8. Reinstall the mirror assembly to the door.
9. Install the 6.0 mm X 1.0 mm headed fastener, adjusting it to obtain the original pressure against the mirror arm. DO NOT over-torque this fastener.
10. Reinstall the screws which secure the mirror cover to the door.
WARRANTY INFORMATION
For vehicles repaired under warranty, use:
Labor Description Labor Time
Operation
R3260 RH mirror R&R 0.4 Hr.
R3261 LH mirror R&R 0.4 Hr.
(Time is different than published time in Labor Operation Guide.)