PREMATURE OUTSIDE EDGE WEAR ON RADIAL FRONT TIRES. GMC Truck GMC MD Steel Tilt 67.2" 1988

SUBJECT: PREMATURE OUTSIDE EDGE WEAR ON RADIAL FRONT TIRES (RESET TOE IN)

MODELS: 1988-97 CHEVROLET TILTMASTER AND GMC FORWARD W4 MODELS

CONDITION:

SOME OWNERS MAY COMMENT ABOUT PREMATURE OUTSIDE EDGE WEAR ON THE FRONT TIRES.

CAUSE:

LOCAL URBAN PICKUP AND DELIVERY ROUTES REQUIRING HIGH AMOUNTS OF TURNING, MAXIMUM FRONT END WEIGHT DISTRIBUTION AND/OR IMPROPER TIRE PRESSURE MAY BE CONTRIBUTING FACTORS TO THIS CONCERN. IN ADDITION, FRONT END ALIGNMENT TOE ANGLE MAY BE A FACTOR.

CORRECTION:

IF THE ABOVE POTENTIAL CAUSES ARE DETERMINED NOT TO BE OUT OF ESTABLISHED NORMS, RESET THE FRONT END ALIGNMENT TOE ANGLE TO "0", FOLLOWING THE PROCEDURE DESCRIBED IN THE APPLICABLE SERVICE MANUAL, SECTION 3A. BEFORE PERFORMING TOE-IN MEASUREMENT AND ADJUSTMENT, CHECK THE CASTER AND CAMBER SETTINGS TO ENSURE THAT THEY ARE WITHIN PUBLISHED SPECIFICATIONS. IN MOST CASES, CASTER AND CAMBER SETTINGS WILL BE WITHIN SPECIFICATIONS AND NOT REQUIRE ADJUSTMENT.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OP DESCRIPTION LABOR TIME E2020 WHEEL ALIGNMENT USE PUBLISHED CHECK AND/OR ADJUST LABOR OPERATION TIME

IMPORTANT: LABOR OPERATION IS CODED TO BASE VEHICLE COVERAGE IN THE WARRANTY SYSTEM.

FIGURES: 0

CAPTIONS: 0

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM 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.