CAMPAIGN: PARKING BRAKE LEVER ACTUATION CAM CRACKED-NEW P/N

DEFECT INVOLVED GENERAL MOTORS HAS DETERMINED THAT A DEFECT WHICH RELATES TO MOTOR VEHICLE SAFETY EXISTS IN CERTAIN 1985-1986 GMC C6, C7, B6 AND P6 MEDIUM DUTY MODEL TRUCKS EQUIPPED WITH A TRANSMISSION MOUNTED INTERNAL EXPANDING TYPE 9" X 3" PARKING BRAKE. THESE MODEL TRUCKS MAY HAVE A PARKING BRAKE ACTUATION LEVER CAM WHICH CONTAINS A QUENCH CRACK. UNDER NORMAL OPERATING CONDITIONS, IN TIME, THE CRACK CAN GRADUALLY WIDEN, REDUCING THE HOLDING FORCE OF THE PARKING BRAKE. THIS WIDENING OF THE CRACK CAN ALSO OCCUR WHILE THE PARKING BRAKE IS APPLIED. IF THIS SHOULD HAPPEN TO AN UNATTENDED VEHICLE, IT COULD ROLL AWAY UNCONTROLLED. TO CORRECT THIS CONDITION A NEW ACTUATION LEVER WILL BE INSTALLED. VEHICLES INVOLVED INVOLVED ARE CERTAIN 1985-1986 GMC C6, C7, B6 AND 06 MEDIUM DUTY TRUCKS EQUIPPED WITH A TRANSMISSION MOUNTED INTERNAL EXPANDING TYPE 9" X 3" PARKING BRAKE BUILT WITHIN THE FOLLOWING VIN BREAKPOINTS: MODEL YEAR PLANT FROM THROUGH 1985 PONTIAC FV605568 FV631629 ONE ADDITIONAL 1985 VEHICLES ARE INVOLVED: 1GDG6D1A0FV632287 1986 THE FOLLOWING 1986 GMC VEHICLES ARE INVOLVED: 1GDG7D1B4GV500883 1GDG7D1B8GV500885 1GDG7D1B8GV500918 1GDL7D1B1GV500998 1GDL7D1BG5V501006 1GDL7D1B7GV501010 THE SPECIFIC VEHICLES INVOLVED IN THIS CAMPAIGN HAVE BEEN IDENTIFIED BY VEHICLE IDENTIFICATION NUMBER COMPUTER LISTINGS. THESE LISTINGS ARE FURNISHED TO ALL INVOLVED DEALERS WITH THE CAMPAIGN BULLETIN. DEALER CAMPAIGN RESPONSIBILITY DEALERS ARE TO SERVICE ALL VEHICLES SUBJECT TO THIS CAMPAIGN AT NO CHARGE TO OWNERS, REGARDLESS OF MILEAGE, AGE OF VEHICLE, OR OWNERSHIP, FROM THIS TIME FORWARD. WHENEVER A VEHICLE SUBJECT TO THIS CAMPAIGN IS TAKEN INTO YOUR NEW OR USED VEHICLE INVENTORY, OR IT IS IN YOUR DEALERSHIP FOR SERVICE IN THE FUTURE, YOU SHOULD TAKE THE STEPS NECESSARY TO BE SURE THE CAMPAIGN CORRECTION HAS BEEN MADE BEFORE RESELLING OR RELEASING THE VEHICLE. OWNERS OF VEHICLES RECENTLY SOLD FROM YOUR NEW VEHICLE INVENTORY ARE TO BE CONTACTED BY THE DEALER, AND ARRANGEMENTS MADE TO MAKE THE REQUIRED MODIFICATION ACCORDING TO INSTRUCTIONS CONTAINED IN THIS BULLETIN. IF NO OWNER'S NAME AND ADDRESS WERE AVAILABLE TO GMC TRUCK AT THE TIME OF CAMPAIGN INITIATION, THE DEALER WILL DETERMINE THE OWNER'S NAME AND ADDRESS FROM THE DEALERSHIP SALES RECORDS. PLEASE PROVIDE THIS INFORMATION DIRECTLY ON THE SECOND COPY OF THE LISTING NEXT TO THE APPLICABLE VIN, SO THAT OUR RECORDS MAY BE UPDATED AND THE APPROPRIATE NOTIFICATION MAILED TO THE OWNER. THIS SECOND COPY SHOULD THEN BE SUBMITTED TO THE ADDRESS LISTED BELOW IN THE PREVIOUSLY SUPPLIED YELLOW CAMPAIGN ENVELOPES. GMC TRUCK GENERAL MOTHERS CORPORATION 101 UNION STREET PLYMOUTH, MICHIGAN 48170 OWNER NOTIFICATION OWNERS WILL BE NOTIFIED OF THIS CAMPAIGN ON THEIR VEHICLES BY GMC TRUCK (SEE COPY OF OWNER LETTER INCLUDED WITH THIS BULLETIN). A LISTING OF OWNER NAMES AND ADDRESSES HAVE BEEN FURNISHED TO THE INVOLVED DEALERS TO ENABLE DEALERS TO FOLLOW UP WITH OWNERS INVOLVED IN THIS CAMPAIGN. THIS LISTING MAY CONTAIN OWNER NAMES AND ADDRESSES OBTAINED FROM STATE MOTOR VEHICLE REGISTRATION RECORDS. THE USE OF SUCH MOTOR VEHICLE REGISTRATION DATA FOR ANY OTHER PURPOSE IS A VIOLATION OF LAW IN SEVERAL STATES. ACCORDINGLY, YOU ARE URGED TO LIMIT THE USE OF THIS LISTING TO THIS CAMPAIGN. SERVICE PROCEDURE REMOVE PARKING BRAKE ACTUATION LEVER AND REPLACE WITH A NEW LEVER FOLLOWING THE SERVICE PROCEDURE AS OUTLINED IN THE 1984 GMC MEDIUM DUTY TRUCK SERVICE MANUAL, X-8433, SECTION 5C. REFERENCE FIGURE NO. 1, ITEM NO. 7. PARTS INFORMATION PARTS ARE TO BE OBTAINED FROM THE WAREHOUSING & DISTRIBUTION DIVISION OF GENERAL MOTORS (WDDGM). TO ENSURE THAT THESE PARTS WILL BE OBTAINED AS SOON AS POSSIBLE, THEY SHOULD BE ORDERED FROM WDDGM ON A C.I.O. ORDER WITH NO SPECIAL INSTRUCTION CODE, BUT ORDER UNDER AN ADIVSE CODE (2). PART NUMBER DESCRIPTION QUANTITY/VEHICLE 2005754 PARKING BRAKE ACTUATION LEVER 1 WARRANTY INFORMATION DEALERS SHOULD SUBMIT AN ACCURATELY FILLED OUT WARRANTY REPAIR ORDER ON EACH VEHICLE COMPLETED UNDER THIS CAMPAIGN. LABOR OPERATION *TIME TROUBLE NUMBER DESCRIPTION ALLOWANCE CODE V3130 REMOVE AND REPLACE PARKING 0.5 HR. 96 BRAKE ACTUATION LEVER. *FOR DEALER TO RECEIVE ADMINISTRATION TIME ALLOWANCE ASSOCIATED WITH THIS CAMPAIGN, ADD 0.1 HOUR TO THE LABOR OPERATION TIME ALLOWANCE. PT #2005754 FIGURE NO. 1 - 229 X 76 MM (9X3-INCH) BRAKE COMPONENTS 1. DRUM 12. BELLCRANK BRACKET 2. MOUNTING BOLT 13. BELLCRANK MOUNTING BOLT NUT 3. WASHER 14. WASHER 4. MOUNTING (SUPPORT) PLATE 15. WASHER 5. SHOE AND LINING 16. BOLT 6. RETURN SPRING 17. BELLCRANK 7. ACTUATION LEVER 18. LUBRICATION FITTING 8. ANCHOR SPRING 19. BUSHING 9. COTTER PIN 20. LARGE WASHER 10. CLEVIS 21. WASHER 11. CLEVIS PIN 22. BELLCRANK MOUNTING BOLT CAMPAIGN IDENTIFICATON LABEL EACH VEHICLE MODIFIED IN ACCORDANCE WITH THE INSTRUCTIONS OUTLINED IN THIS PRODUCT CAMPAIGN BULLETIN WILL REQUIRE A "CAMPAIGN IDENTIFICATION LABEL". EACH LABEL PROVIDES A SPACE TO INCLUDE THE FIVE (5) DIGIT DEALER CODE OF THE DEALER PERFORMING THE CAMPAIGN SERVICE. THIS INFORMATION MAY BE INSERTED WITH A TYPEWRITER OR BALLPOINT PEN. EACH "CAMPAIGN IDENTIFICATION LABEL" IS TO BE LOCATED ON THE RADIATOR CORE SUPPORT IN AN AREA WHICH IS VISIBLE WHEN THE VEHICLE IS BROUGHT IN FOR PERIODIC SERVICING BY THE OWNER. APPLY "CAMPAIGN IDENTIFICATION" LABEL ONLY ON A CLEAN DRY SURFACE. ADMINISTRATIVE PROCEDURE PROCEDURES COVERING THIS CAMPAIGN ARE OUTLINED IN SECTION V OF YOUR DEALERSHIP'S "GMC TRUCK CLAIMS PROCESSING MANUAL" #SD8519.

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.