OUTSIDE REAR VIEW MIRROR VIBRATION (INSTALL SET SCREW). GMC Truck S15 Pickup - 2WD 1983

For 1990-2009 cars

# OUTSIDE REAR VIEW MIRROR VIBRATION (INSTALL SET SCREW)

#### 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 6.0MM X 1.0MM (DIAMETER X THREAD PITCH) SET SCREW FASTENER (FIGURE 3, ITEM A) (PROCURED LOCALLY). THE APPROXIMATE FASTENER LENGTH SHOULD BE 10MM.

#### 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 6.0MM X 1.0MM 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 OP DESCRIPTION LABOR TIME R3260 RH MIRROR R+R 0.4 R3261 LH MIRROR R+R 0.4 (TIME IS DIFFERENT THAN PUBLISHED TIME IN LABOR OPERATION GUIDE)

FIGURES: 3

CAPTIONS: FIGURE 1 - MIRROR TRIM COVER REMOVAL FIGURE 2 - MIRROR ASSEMBLY FIGURE 3 - RETENTION SPRING

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO IMFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.

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