CAMPAIGN: PWR. STG. CYLINDER ATTACHING BOLTS LOOSEN

DEFECT INVOLVED GENERAL MOTORS HAS DETERMINED THAT A DEFECT WHICH RELATES TO MOTOR VEHICLE SAFETY EXISTS IN SOME 1985 AND 1986 C7 MEDIUM DUTY TRUCKS EQUIPPED WITH POWER STEERING (RPO N40) AND 12,000# FRONT AXLES (RPO FS7, FT7 OR F54). THE POWER STEERING ASSIST CYLINDER MOUNTING BRACKET BOLTS MAY LOOSEN. PAINT ON THE BOLT THREADS AND THE MOUNTING BRACKET MATING SURFACE COULD CAUSE LOSS OF CLAMP LOAD IN THE FASTENERS. THIS MAY RESULT IN LOOSENESS AND ERRATIC STEERING DURING FULL TURNS. IF THESE WARNINGS ARE NOT HEEDED, CONTINUED OPERATION OF THE VEHICLE COULD CAUSE THE ANCHOR BRACKET BOLTS TO SHEAR RESULTING IN DETACHMENT OF THE POWER CYLINDER FROM THE FRAME RAIL. A DETACHED POWER CYLINDER COULD CAUSE RESTRICTED STEERING AND SEVER THE FRONT BRAKE HOSE WHICH WOULD RESULT IN LOSS OF FRONT AXLE BRAKING. WITH EITHER CONDITION, VEHICLE CRASH COULD RESULT. TO ELIMINATE ANY POSSIBILITY OF THESE CONDITIONS OCCURRING, ALL THE AFFECTED VEHICLES MUST HAVE PRESENTLY INSTALLED ANCHOR BRACKET ATTACHING FASTENERS REMOVED, PAINT REMOVED FROM THE MATING SURFACES OF THE BRACKET AND FRAME RAIL, AND REPLACED WITH NEW BOLTS, HARDENED FLAT WASHERS, PREVAILING TORQUE NUTS, AND TORQUED TO PROPER SPECIFICATIONS. VEHICLES INVOLVED INVOLVED ARE ALL 1985 AND 1986 C7 MEDIUM DUTY GMC TRUCKS EQUIPPED WITH (N40) POWER STEERING AND 12,000# (RPO FS7, FT7 OR F54) FRONT AXLES BUILT WITHIN THE FOLLOWING VIN BREAKPOINTS: PLANT MODEL YEAR FROM THROUGH PONTIAC 1985 FV612399 EOP 1986 SOP GV538644 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 DEALERHSHIP 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 MOTORS 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 INLCUDED WITH THIS BULLETIN). A LISTING OF OWNER NAMES AND ADDRESSES HAS 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 1. REMOVE THE THREE POWER STEERING CYLINDER TO FRAME ATTACHING BOLTS AND DISCARD BOLTS, NUTS AND WASHERS. FIGURE NO. 1. 2. REMOVE PAINT FROM FRAME RAIL AND POWER STEERING CYLINDER MATING SURFACES USING A WIRE BRUSH. 3. INSTALL POWER STEERING CYLINDER MOUNTING BRACKET TO FRAME USING NEW BOLTS, NEW PREVAILING TORQUE NUTS AND WASHERS. TORQUE NUTS TO 75 NM (55 LB. FT.) 4. AFTER ASSEMBLY, REPAINT EXPOSED METAL USING A QUALITY PAINT. PARTS INFORMATION PARTS ARE TO BE OBTAINED FROM GENERAL MOTORS SERVICE PARTS OPERATIONS (GMSPO). TO ENSURE THAT THESE PARTS ARE OBTAINED AS SOON AS POSSIBLE, THEY SHOULD BE ORDERED FROM GMSPO ON A CIO ORDER WTH NO SPECIAL INSTRUCTION CODE, BUT ORDER ON AN ADVISE CODE 2. PART NUMBER DESCRIPTION QUANTITY 9441579 BOLT 3 9422301 NUT 3 2040949 WASHER 3 WARRANTY INFORMATION DEALER SHOULD SUBMIT A WARRANTY CLAIM FOR EACH VEHICLE COMPLETED UNDER THIS CAMPAIGN. LABOR OPERATION *TIME TROUBLE NUMBER DESCRIPTION ALLOWANCE CODE V3760 R AND R NUTS, BOLTS, 0.6 HRS. 96 AND WASHERS. CLEAN MATING SURFACES AND PAINT *ADD 0.1 HT. FOR ADMINISTRATIVE TIME ALLOWANCE. CAMPAIGN IDENTIFICATION LABEL EACH VEHICLE MODIFIED IN ACCORDANCE WITH THE INSTRUCTIONS OUTLINED IN THIS PRODUCT CAMPAIGN BULLETIN WILL REQUIRE A "CAMPAIGN IDENTIFI- CATION LABEL". EACH LABEL PROVIDES A SPACE TO INCLUDE THE FIVE 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 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 "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.