CAMPAIGN: INSTALL TOWING BRKT FRT/REAR BUMPER COVER DAMAGE

GENERAL MOTORS HAS DETERMINED THAT SOME 1980 CORVETTES MAY EXPERIENCE FRONT OR REAR BUMPER COVER DAMAGE DURING VEHICLE LIFT IN PREPARATION FOR TOWING. IN ORDER TO CORRECT THIS CONDITION THE ADDITION OF TOWING BRACKETS IS REQUIRED TO FACILITATE THE USE OF TOWING TIMBER NECESSARY TO OBTAIN SUFFICIENT TOE SLING, CHAIN AND BAR CLEARANCE.

VEHICLES INVOLVED

ALL 1980 CORVETTS ASSEMBLED AT ST. LOUIS WITHIN THE FOLLOWING PARAMETERS ARE THE ONLY VEHICLES INVOLVED:

PLANT FROM THROUGH

ST. LOUIS 1Z878AS400001 1Z878AS402944

- THESE VEHICLES WILL REQUIRE BOTH FRONT AND REAR BRACKETS.

ST. LOUIS 1Z878AS402945 1Z878AS404172

- THESE VEHICLES WILL REQUIRE REAR BRACKETS ONLY

INVOLVED VEHICLES HAVE BEEN IDENTIFIED BY VEHICLE IDENTIFICATION NUMBER COMPUTER LISTINGS. COMPUTER LISTINGS CONTAIN THE COMPLETE VEHICLE IDENTIFICATION NUMBER, OWNER NAME AND ADDRESS DATA, AND ARE FURNISHED TO THE INVOLVED DEALERS WITH THE CAMPAIGN BULLETIN. OWNER NAME AND ADDRESS DATA FURNISHED WILL ENABLE DEALERS TO FOLLOW UP WITH OWNERS INVOLVED IN THIS CAMPAIGN.

THESE LISTINGS 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 THE FOLLOW-UP NECESSARY TO COMPLETE THIS CAMPAIGN. ANY DEALER NOT RECEIVING A COMPUTER LISTING WITH THE CAMPAIGN BULLETIN WAS NOT SHIPPED ANY INVOLVED VEHICLES.

OWNER NOTIFICATION

OWNERS WILL BE NOTIFIED OF THIS CAMPAIGN ON THEIR VEHICLES BY CHEVROLET MOTOR DIVISION (SEE COPY OF OWNER LETTER INCLUDED WITH THIS BULLETIN).

DEALER CAMPAIGN RESPONSIBILITY

DEALERS ARE TO SERVICE ALL VEHICLES SUBJECT TO THIS CAMPAIGN, 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.

SERVICE PROCEDURE

ON VEHICLES REQUIRING BOTH FRONT AND REAR BRACKETS FOLLOW INSTALLATION PROCEDURE A AND B. IF ONLY REAR BRACKETS ARE REQUIRED FOLLOW INSTALLATION PROCEDURE B.

A. FRONT BRACKET INSTALLATION

1. DISCONNECT BATTERY AND ELEVATE VEHICLE ON HOIST. 2. BEND THE HOOK PORTION OF THE BUMPER EXTENSION ASSEMBLY THAT POSITIONS THE NOSE OF THE RADIATOR LOWER AIR BAFFLE PANEL DOWNWARD (REF. FIGURE #1)

3. REMOVE THE RADIATOR LOWER AIR BAFFLE PANEL AND EXTENSIONS TO PROVIDE ACCESS FOR WELDING. 4. POSITION FRONT TOWING BRACKET P/N 14028560 SO ITS SURFACES ARE FLUSH TO BOTH THE BACK AND LOWER ROLL SURFACES OF THE BUMPER EXTENSION ASSEMBLY AND CLAMP. 5. ARC WELD THE TOWING BRACKET TO THE BUMPER EXTENSION ASSEMBLY AS SHOWN IN FIGURE #2. (SECURE GROUND TO BUMPER EXTENSION ASSEMBLY).

NOTE: CAUTION MUST BE TAKEN TO PREVENT EXCESSIVE HEAT, METAL BURN THROUGH AND/OR EXCESSIVE WELD SPLATTER. 6. REMOVE CLAMP, WIRE BRUSH AND APPLY ANTI-CORROSION MATERIAL, PN 1052290, TO AFFECTED SURFACES. 7. REINSTALL THE RADIATOR LOWER AIR BAFFLE PANEL AND EXTENSIONS, TORQUE ATTACHING SCREWS TO 1.8 - 2.4 NM (16-21 IN.LBS.). SECURE IN POSITION BY BENDING UPWARD THE HOOK PORTION OF THE BUMPER EXTENSION ASSEMBLY.

B. REAR BRACKET INSTALLATION

1. ELEVATE VEHICLE ON HOIST (APPLICABLE ONLY IF PART A WAS NOT PERFORMED). 2. REMOVE SPARE TIRE LAMP ASSEMBLY FROM BOTTOM OF REAR BUMPER IMPACT BAR (REF FIG. #3). 3. LOCATE THE FOUR (4) REAR BRACKET MOUNTING HOLES ON THE REAR BUMPER IMPACT BAR AS FOLLOWS (REF. FIG. #3):

A. ON THE BOTTOM SURFACE OF THE REAR IMPACT BAR, DRAW A LINE CONNECTING TWO (2) POINTS, EACH POINT LOCATED 1.37 INCHES 1-3/8") REARWARD OF THE SQUARED, LEADING EDGE SURFACES FOUND AT BOTH ENDS OF THE IMPACT BAR. THIS REFERENCE LINE WILL BE USED TO LOCATE EACH BRACKET'S MOUNTING HOLES IN FORE AND AFT LOCATIONS. B. MEASURE OUTBOARD FROM THE OUTSIDE LAMP ASSEMBLY MOUNTING HOLE A DISTANCE OF 1.37 INCHES (1-3/8") ALONG THE DRAWN LINE AND MARK THIS POINT AS THE INBOARD MOUNTING HOLE CENTER FOR THE RIGHT HAND TOW BRACKET. C. FROM THE HOLE CENTER POINT DETERMINED ABOVE, MEASURE 19.16 INCHES (19-5/32 INCHES) ACROSS THE CAR ALONG THE LINE DRAWN AND MARK THIS POINT AS THE INBOARD MOUNTING HOLE CENTER FOR THE LEFT HAND TOW BRACKET. D. USING EITHER THE BRACKET ITSELF AS A TEMPLATE OR ELSO MEASURING AN ADDITIONAL 6.37 INCHES (6 3/8") OUTBOARD FROM EACH OF TWO HOLE LOCATIONS ALREADY DEFINED, LOCATE AND MARK ON THE DRAWN LINE THE OUTBOARD MOUNTING HOLE CENTERS FOR EACH TOW BRACKET. 4. CENTER PUNCH HOLE CENTERS, DRILL AND DEBURR FOUR (4) .406 INCH (13/32 INCH) DIAMETER HOLES IN THE IMPACT BAR. 5. APPLY ANTI-CORROSION MATERIAL, P/N 1052290, TO DRILLED AREAS. 6. MOUNT THE TWO (2) REAR BRACKETS P/N 14028582, USING TWO (2) BOLTS, P/N 549790, AND TWO (2) NUTE P/N 11502609, FOR EACH BRACKET. SEE FIG. #4. 7. TORQUE NUTS TO 20-30 NM (15-22 FT.LBS.) 8. REINSTALL SPARE TIRE LAMP ASSEMBLY TO REAR BUMPER IMPACT BAR AND TORQUE MOUNTING SCREWS TO 2.8-4.0 NM (25-35 IN LBS) 9. LOWER VEHICLE AND RECONNECT BATTERY (APPLICABLE ONLY IF PART A WAS PERFORMED).

PARTS INFORMATION

PARTS REQUIRED TO COMPLETE THIS MODIFICATION ARE BEING PRESHIPPED FROM CHEVROLET CENTRAL OFFICE ON A PRORATED BASIS NO CHARGE. THE REQUIRED PARTS CONSIST OF:

PART NUMBER QUANTITY DESCRIPTION

14028560 1 PER VEHICLE FRONT TOWING BRACKET 14028582 2 PER VEHICLE REAR TOWING BRACKET 549790 4 PER VEHICLE REAR TOWING BRACKET BOLTS 11602609 4 PER VEHICLE REAR TOWING BRACKET NUTS

PARTS PRORATES HAVE BEEN DETERMINED FROM THE VEHICLE COMPUTER LIST FURNISHED TO THE INVOLVED DEALERS.

WARRANTY INFORMATION, FAILURE CODE, LABOR TIME ALLOWANCE, FAILED LABOR OPERATION & CONDITION CODE

SUBMIT A PRODUCT RECALL CAMPAIGN WARRANTY CLAIM WITH THE INFORMATION INDICATED BELOW.

FAILURE FAILED LABOR LABOR TIME CODE OPERATION ALLOWANCE

00 V0260 .5 HOURS

DESCRIPTION: INSTALL REAR TOWING BRACKET ACCORDING TO THE INSTRUCTIONS CONTAINED IN THIS BULLETIN.

00 V0261 1.0 HOURS

DESCRIPTION: INSTALL BOTH FRONT AND REAR TOWING BRACKETS ACCORDING TO THE INSTRUCTIONS CONTAINED IN THIS BULLETIN.

DEALERS WILL AUTOMATICALLY RECEIVE .1 HOURS DEALER ADMINISTRATIVE DETAIL ASSOCIATED WITH THIS CAMPAIGN. DEALERS WILL AUTOMATICALLY BE CREDITED 30 PERCENT OF DEALER NET WHEN PARTS ARE FURNISHED AT NO CHARGE BY CHEVROLET. "FAILED LABOR OPERATION" V0260 ($.86), "FAILED LABOR OPERATION," V0261 ($1.34.) IN ADDITION DEALERS WILL AUTOMATICALLY RECEIVE ($.50) FOR ANTI-CORROSIVE MATERIAL USED IN CONJUNCTION WITH THIS MODIFICATION.

CAMPAIGN IDENTIFICATION 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 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

THE APPROPRIATE CAMPAIGN HANDLING AND ADMINISTRATIVE PROCEDURE MAY BE FOUND IN THE CHEVROLET SERVICE POLICIES AND PROCEDURES MANUAL, SECTION IV, PAGES 1 AND 2, DATED OCTOBER 1979 IN YOUR DEALERSHIP.

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.