CAMPAIGN: SOFT LOWER CONTROL ARM ATTACHING BOLTS. GMC Truck S15 Pickup - 2WD 1991

For 1990-2009 cars

# CAMPAIGN: SOFT LOWER CONTROL ARM ATTACHING BOLTS

NUMBER : 91-C-03 GMC DATE: NOVEMBER, 1990 : 91C04 CHEVROLET

GROUP : 3C - FRONT SUSPENSION

#### SUBJECT : SOFT LOWER CONTROL ARM ATTACHMENT NUTS

#### MODELS : 1991 S/T TRUCKS BUILT AT SHREVEPORT ASSEMBLY PLANT

*** FOR INFORMATION CONCERNING CHEVROLET CAMPAIGN 91C04 SEE BOTTOM *** OF BULLETIN.

THE NATIONAL TRAFFIC AND MOTOR VEHICLE SAFETY ACT, AS AMENDED, PROVIDE THAT EACH VEHICLE WHICH IS SUBJECT TO A RECALL CAMPAIGN OF THIS TYPE MUST BE ADEQUATELY REPAIRED WITHIN A REASONABLE TIME AFTER THE OWNER H TENDERED IT FOR REPAIR. A FAILURE TO ADEQUATELY REPAIR WITHIN 60 DAYS AFTER TENDER OF A VEHICLE IS PRIMA FACIE EVIDENCE OF FAILURE TO REPAIR WITHIN A REASONABLE TIME.

IF THE CONDITION IS NOT ADEQUATELY REPAIRED WITHIN A REASONABLE TIME, THE OWNER MAY BE ENTITLED TO AN IDENTICAL OR REASONABLY EQUIVALENT VEHICLE AT NO CHARGE, OR TO A REFUND OF THE PURCHASE PRICE LESS A REASONABLE ALLOWANCE FOR DEPRECIATION.

TO AVOID HAVING TO PROVIDE THESE BURDENSOME SOLUTIONS, EVERY EFFORT MU BE MADE TO PROMPTLY SCHEDULE APPOINTMENTS WITH OWNERS AND TO REPAIR THEIR VEHICLES AS SOON AS POSSIBLE. AS YOU WILL SEE IN READING THE ATTACHED COPY OF THE LETTER WHICH IS BEING SENT TO OWNERS, THE OWNER I BEING INSTRUCTED TO CONTACT THE NEAREST GMC ZONE OFFICE IF THE DEALER DOES NOT REMEDY THE CONDITION WITHIN FIVE DAYS OF THE MUTUALLY AGREED UPON SERVICE DATE. IF THE CONDITION IS NOT REMEDIED WITHIN A REASONAB TIME, THEY ARE INSTRUCTED HOW TO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION.

DEFECT INVOLVED

GENERAL MOTORS HAS DETERMINED THAT A DEFECT WHICH RELATES TO MOTOR VEHICLE SAFETY EXISTS IN CERTAIN 1991 S/T TRUCKS BUILT AT THE SHREVEPO ASSEMBLY PLANT. THESE TRUCKS MAY HAVE NUTS, USED TO ATTACH THE LOWER CONTROL ARMS, REAR SPRING AND SHACKLE, AND REAR SHOCK ABSORBERS, WHICH DO NOT MEET SPECIFICATIONS. IT IS POSSIBLE FOR THE NUT TO "STRIP" PRI TO OR AT THE SPECIFIED TORQUE, RESULTING IN A LOSS OF CLAMP LOAD. IF CLAMP LOAD WERE LOST ON A LOWER CONTROL ARM ATTACHMENT, THE ARM COULD DETACH, RESULTING IN LOSS OF VEHICLE CONTROL AND A VEHICLE CRASH WITHO PRIOR WARNING.

TO PREVENT THIS CONDITION FROM OCCURRING, DEALERS ARE TO REPLACE ALL O THE LOWER CONTROL ARM ATTACHMENT NUTS. ADDITIONALLY, ALL OF THE REAR SPRING AND SHACKLE AND REAR SHOCK ABSORBER NUTS WILL BE REPLACED.

VEHICLES INVOLVED

INVOLVED ARE CERTAIN 1991 S/T TRUCKS BUILT AT THE SHREVEPORT ASSEMBLY PLANT (BUILT 8/6/90). INVOLVED VIN'S ARE LISTED BELOW:

VIN VIN

1GTCS14R3M8522814 1GTCS14A4M8522833 1GTCS19Z4M8522815 1GTCS14R0M8522835 1GTCS14R7M8522816 1GTCS14Z4M8522837 1GTCS19Z8M8522817 1GTCS19Z5M8522838 1GKCS18Z2M8522818 1GTCS14R4M8522840 1GTCS14R2M8522819 1GTCS14Z6M8522841 1GKCS18Z0M8522820 1GKCS18ZXM8522842 1GTCS19RXM8522821 1GTCS14A7M8522843 1GTCS14AXM8522822 1GTCS14R1M8522844 1GKCS18Z6M8522823 1GKCS18Z7M8522846 1GTCS19R7M8522825 1GTDT14Z4M8522824 1GKCS18Z1M8522826 1GKCT18Z0M8522832 1GTCS14A9M8522827 1GKCT18Z4M8522834 1GTCS14A0M8522828 1GKCT18Z8M8522836 1GTCS19Z4M8522829 1GKCT18Z3M8522839 1GKCS18Z3M8522830 1GKCT18Z9M8522845 1GTCS18Z0M8522831 1GKCT18Z6M8522849 1GKCT18Z2M8522850

VEHICLE IDENTIFICATION NUMBER COMPUTER 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. DEALERS ARE TO INSPECT AND CORRECT ALL AFFECT VEHICLES IN NEW AND USED VEHICLE STOCK PRIOR TO THEIR SALE.

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 ENSURE THE CAMPAIGN CORRECTION HAS BEEN MADE BEFORE RESELLING OR RELEASING THE VEHICLE.

OWNERS OF VEHICLES RECENTLY SOLD FROM YOUR NEW VEHICLE INVENTORY ARE T BE CONTACTED BY THE DEALER AND ARRANGEMENTS MADE TO MAKE THE REQUIRED CORRECTION ACCORDING TO INSTRUCTIONS CONTAINED IN THIS BULLETIN.

IF THE NAME AND ADDRESS OF THE OWNER OF AN INVOLVED VEHICLE WAS UNAVAILABLE TO GMC TRUCK DIVISION AT THE TIME OF CAMPAIGN INITIATION, THE DEALER MUST 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 LISTE BELOW IN THE PREVIOUSLY SUPPLIED YELLOW CAMPAIGN ENVELOPES.

GMC TRUCK DIVISION GENERAL MOTORS CORPORATION 101 UNION STREET PLYMOUTH, MICHIGAN 48170

OWNER NOTIFICATION

OWNERS WILL BE NOTIFIED OF THIS CAMPAIGN ON THEIR VEHICLES BY GMC TRUC DIVISION (SEE COPY OF OWNER LETTER INCLUDED WITH THIS BULLETIN). A LISTING OF OWNER NAMES AND ADDRESSES HAS BEEN FURNISHED TO THE INVOLVE 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 SEVERAL STATES. ACCORDINGLY, YOU ARE URGED TO LIMIT THE USE OF THIS LISTING TO THIS CAMPAIGN.

SERVICE PROCEDURE

1. RAISE THE VEHICLE ON A HOIST.

2. IDENTIFY THE TYPE OF FRONT AND REAR SUSPENSION, AND USING FIGURES 1, 2 AND 3 REPLACE THE IDENTIFIED FASTENERS ONE AT A TIME.

#### NOTE: DO NOT REMOVE ALL IDENTIFIED FASTENERS AT ONCE, THIS MA CAUSE A CHANGE IN SUSPENSION ADJUSTMENT.

3. INSTALL "CAMPAIGN IDENTIFICATION LABEL."

PARTS INFORMATION

PARTS ARE TO BE OBTAINED FROM GENERAL MOTORS SERVICE PARTS OPERATION (GMSPO). TO ENSURE THAT THESE PARTS WILL BE OBTAINED AS SOON AS POSSIBLE, THEY SHOULD BE ORDERED FROM GMSPO ON A C.I.O. ORDER WITH NO SPECIAL INSTRUCTION CODE BUT ORDER UNDER AN ADIVSE CODE (2).

PART NUMBER DESCRIPTION QUANTITY

11500748 NUT S TRUCK = 10 T TRUCK = 12

WARRANTY INFORMATION

DEALERS SHOULD SUBMIT AN ACCURATELY FILLED OUT WARRANTY REPAIR ORDER O EACH VEHICLE COMPLETED UNDER THIS CAMPAIGN.

LABOR OPERATION *TIME TROUBLE NUMBER DESCRIPTION ALLOWANCE CODE

REMOVE AND REPLACE ALL INVOLVED NUTS

V6420 - S TRUCK .5 HR 96 V6421 - T TRUCK .7 HR 96

ADD: R & R SKID PLATE .2 HR 96

*FOR DEALER TO RECEIVE ADMINISTRATIVE TIME ALLOWANCE ASSOCIATED WITH THIS CAMPAIGN, ADD 0.1 HOUR TO THE LABOR OPERATION TIME ALLOWANCE.

CAMPAIGN IDENTIFICATION LABEL

EACH VEHICLE CORRECTED 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 CAMPAIGN NUMBER AN FIVE (5) DIGIT DEALER CODE OF THE DEALER PERFORMING THE CAMPAIGN SERVICE. THIS INFORMATION MAY BE INSERTED WITH A TYPEWRITER OR BALL POINT PEN.

EACH "CAMPAIGN IDENTIFICATION LABEL" IS TO BE LOCATED ON THE RADIATOR CORE SUPPORT IN AN AREA WHICH WILL BE 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 "GM TRUCK CLAIMS PROCESSING MANUAL" #P 8919.

*** THE FOLLOWING INFORMATION IS SPECIFIC FOR CHEVROLET MOTOR CAR *** DIVISION.

VEHICLES INVOLVED FOR CHEVROLET ONLY:

INVOLVED ARE CERTAIN 1991 S/T MODEL TRUCKS BUILT AT THE SHREVEPORT ASSEMBLY PLANT BUILT WITHIN THE FOLLOWING VIN BREAKPOINTS:

PLANT YEAR MODEL PLANT CODE FROM THROUGH ---- --------- ----- ------ -------- -------- 1991 S/T TRUCKS SHREVEPORT '8' M8180343 M8180549

SERVICE PROCEDURE FOR CHEVROLET ONLY:

1. RAISE THE VEHICLE ON A HOIST.

2. IDENTIFY THE TYPE OF FRONT AND REAR SUSPENSION, AND USING FIGURES 1, 2 AND 3 REPLACE THE IDENTIFIED 14MM FASTENERS ONE AT A TIME.

#### NOTE: DO NOT REMOVE ALL IDENTIFIED FASTENERS AT ONCE, THIS MAY CAUSE A CHANGE IN SUSPENSION ADJUSTMENT.

3. INSTALL "CAMPAIGN IDENTIFICATION LABEL."

PARTS INFORMATION FOR CHEVROLET ONLY

PARTS ARE TO BE OBTAINED FROM GENERAL MOTORS SERVICE PARTS OPERATION (GMSPO). TO ENSURE THAT THESE PARTS WILL BE OBTAINED AS SOON AS POSSIBLE, THEY SHOULD BE ORDERED FROM GMSPO ON A C.I.O. ORDER WITH NO SPECIAL INSTRUCTION CODE BUT ORDER UNDER AN ADIVSE CODE (2).

PART NUMBER DESCRIPTION QUANTITY

11500748 NUT (14 MM) S TRUCK = 10 T TRUCK = 12

CLAIM INFORMATION FOR CHEVROLET ONLY:

SUBMIT A PRODUCT CAMPAIGN CLAIM WITH THE INFORMATION INDICATED BELOW: * FAILED PART CC LABOR LAB OTH REPAIR PERFORMED PC PART NO. ALLOW FC OP HRS HRS ---------------- -- -------- ----- -- ----- --- --- REMOVE AND REPLACE 10 11500748 ** SK V6420 0.5 0.1 ALL INVOLVED NUTS 00 -S TRUCK

REMOVE AND REPLACE 12 11500748 ** SK V6421 0.7 0.1 ALL INVOLVED NUTS 00 -T TRUCK

* CAMPAIGN ADMINISTRATIVE ALLOWANCE. ADD 0.2 HRS FOR VEHICLES EQUIPPED WITH SKID PLATES AS NEEDED AFTER OBAINING WHOLESALE AUTHORIZATION 'E'.

** THE 'PARTS ALLOWANCE' SHOULD BE THE SUM TOTAL OF THE CURRENT GMSPO DEALER NET PRICE PLUS 30% OF ALL PARTS REQUIRED FOR THE REPAIR.

DEALERS WILL AUTOMATICALLY RECEIVE THE CORRECT LABOR AND MATERIAL ALLOWANCE BASED ON THE LABOR OPERTAION PERFORMED.

REFER TO THE CHEVROLET CLAIMS PROCESSING MANUAL FOR DETAILS ON PRODUCT CAMPAIGN CLAIM SUBMISSION.

*** COPYRIGHT 1990 CHEVROLET MOTOR DIVISION. GENERAL MOTORS CORPORATION.***

---------- DISCLAIMER

DEAR GMC TRUCK OWNER:

THIS NOTICE IS SENT TO YOU IN ACCORDANCE WITH THE REQUIREMENTS OF THE NATIONAL TRAFFIC AND MOTOR VEHICLE SAFETY ACT.

GENERAL MOTORS HAS DETERMINED THAT A DEFECT WHICH RELATES TO MOTOR VEHICLE SAFETY EXISTS IN CERTAIN 1991 S/T TRUCKS BUILT AT THE SHREVEPO ASSEMBLY PLANT. THESE TRUCKS MAY HAVE NUTS, USED TO ATTACH THE LOWER CONTROL ARMS, REAR SPRING AND SHACKLE, AND REAR SHOCK ABSORBERS, WHICH DO NOT MEET SPECIFICATIONS. IT IS POSSIBLE FOR THE NUT TO "STRIP" PRI TO OR AT THE SPECIFIED TORQUE, RESULTING IN A LOSS OF CLAMP LOAD. IF CLAMP LOAD WERE LOST ON A LOWER CONTROL ARM ATTACHMENT, THE ARM COULD DETACH, RESULTING IN LOSS OF VEHICLE CONTROL AND A VEHICLE CRASH WITHO PRIOR WARNING.

TO PREVENT THIS CONDITION FROM OCCURRING, DEALERS ARE TO REPLACE ALL O THE LOWER CONTROL ARM ATTACHMENT NUTS. ADDITIONALLY, ALL OF THE REAR SPRING AND SHACKLE AND REAR SHOCK ABSORBER NUTS WILL BE REPLACED. THI SERVICE WILL BE COMPLETED FOR YOU AT NO CHARGE.

INSTRUCTIONS FOR PERFORMING THIS SERVICE HAVE BEEN SENT TO YOUR GMC DEALER. PLEASE CONTACT YOUR DEALER TO ARRANGE A SERVICE DATE. THE LABOR TIME NECESSARY TO PERFORM THIS CORRECTION WILL VARY FROM 1/2 HOU TO 1-1/2 HOUR. PLEASE ASK YOUR DEALER HOW MUCH ADDITIONAL TIME WILL B NEEDED TO PROCESS YOUR VEHICLE.

YOUR GMC DEALER IS BEST EQUIPPED TO PROVIDE SERVICE TO ENSURE YOUR VEHICLE IS CORRECTED AS PROMPTLY AS POSSIBLE. HOWEVER, IF YOU TAKE YO VEHICLE TO YOUR DEALER ON THE AGREED SERVICE DATE AND THEY DO NOT SERVICE THIS CONDITION ON THAT DATE OR WITHIN FIVE DAYS, WE RECOMMEND YOU CONTACT YOUR NEAREST GMC TRUCK ZONE OFFICE BY TELEPHONE. THE ZONE OFFICE WILL ASSIST YOU AND YOUR DEALER IN GETTING YOUR VEHICLE CORRECTED. THE TELEPHONE NUMBERS OF THE ZONE OFFICES ARE LISTED IN YO WARRANTY AND OWNER ASSISTANCE INFORMATION MANUAL.

AFTER CONTACTING YOUR DEALER AND THE ZONE OFFICE, IF YOU ARE STILL NOT SATISFIED THAT WE HAVE DONE OUR BEST TO REMEDY THIS CONDITION WITHOUT CHARGE WITHIN A REASONABLE TIME, YOU MAY WISH TO WRITE THE ADMINISTRATOR, NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, 400 SEVENTH STREET, S.W., WASHINGTON, D.C. 20590, OR CALL 800-424-9393 (WASHINGTON, D.C. RESIDENTS USE 366-0123).

THE ENCLOSED POSTAGE PAID OWNER REPLY CARD IDENTIFIES YOUR VEHICLE. PRESENTATION OF THIS CARD TO YOUR DEALER WILL ASSIST IN MAKING THE NECESSARY CORRECTION TO YOUR VEHICLE IN THE SHORTEST POSSIBLE TIME. I YOU HAVE SOLD OR TRADED YOUR VEHICLE, PLEASE FURNISH US COMPLETE NAME AND ADDRESS OF THE PERSON YOU SOLD OR TRADED YOUR VEHICLE TO AND RETUR THE CARD TO US.

WE ARE SORRY TO CAUSE YOUR THIS INCONVENIENCE; HOWEVER, WE HAVE TAKEN THIS ACTION IN THE INTEREST OF YOUR SAFETY AND CONTINUED SATISFACTION WITH OUR PRODUCT.

GMC TRUCK DIVISION GENERAL MOTORS CORPORATION

91C03 ENCLOSURE

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.