CAMPAIGN: INJECTION PUMP RETARDED TIMING

GENERAL MOTORS HAS DETERMINED THAT CERTAIN 1981 FULL SIZE CHEVROLET MODELS EQUIPPED WITH 5.7 LITRE DIESEL ENGINES AND SOLD FOR USE IN THE STATE OF CALIFORNIA, MAY NOT COMPLY WITH CALIFORNIA HYDROCARBON EXHAUST EMISSION STANDARDS BECAUSE OF RETARDED TIMING OF THE FUEL INJECTION PUMP.

VEHICLES INVOLVED

INVOLVED ARE CERTAIN 1981 FULL SIZE CHEVROLETS EQUIPPED WITH RPO (LF9) 5.7 LITRE DIESLE ENGINE BUILT FOR USE IN THE STATE OF CALIFORNIA AND ASSEMBLED AT JANESVILLE WITHIN THE FOLLOWING VEHICLE BREAKPOINTS:

FROM THROUGH

1G1AN35N9BJ162551 1G1AN35N6BJ194115

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. OWNERS 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 FOR THE FOLLOW UP NECESSARY TO COMPLETE THIS CAMPAIGN.

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

THIS RECALL CAMPAIGN IS TO BE PERFORMED AT NO CHARGE TO OWNERS ON ALL AFFECTED VEHICLES REGARDLESS OF TIME, MILEAGE, OR OWNERSHIP. DEALERS ARE TO INSPECT AND CORRECT ALL AFFECTED 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 BE SURE THE CAMPAIGN CORRECTION HAS BEEN MADE.

SERVICE PROCEDURE.

1. OPEN THE HOOD AND LOCATE THE PAPER TAG ON THE RIGHT HAND VALVE COVER CONTAINING THE ENGINE SERIAL NUMBER. IF THE ENGINE NUMBER IS BETWEEN D10118410 -D10201731, ROTATING THE INJECTION PUMP WILL BE REQUIRED. IN THE EVENT THE ENGINE NUMBER IS NOT WITHIN THESE BREAKPOINTS OR THE ENGINE NUMBER IS MISSING, DO NOT PERFORM THE CORRECTION. PROCEED TO STEP 7.

2. FOR ENGINES WITHIN THE SERIAL NUMBER BREAKPOINTS, REMOVE THE AIR CLEANER.

3. WIPE THE PUMP AND ADAPTER FLANGES CLEAN AND THEN AFFIX THE SPECIAL TAPE PROVIDED (FIGURE 1, STEP "A"). LINE UP THE LONG LINE IN THE CENTER OF THE TAPE WITH JOINT LINE BETWEEN THE ADAPTER AND PUMP FLANGE. FIG. 1.

4. WITH THE TAPE FIRMLY STUCK IN PLACE, CUT THE TAPE WITH A RAZOR BLADE AT THE JOINT. (FIGURE 1, STEP "B").

5. LOOSEN THE THREE PUMP TO ADAPTER NUTS AND ROTATE THE PUMP FIGURE 2 STEP "C" TO LINE UP THE MARKS ON THE TAPE (FIGURE 2, STEP "D"). RETORQUE NUTS TO 24 NM (18 FT. LBS.).

6. REINSTALL AIR CLEANER.

7. CLOSE THE HOOD.

PARTS INFORMATION

A KIT CONTAINING THE TAPE WILL BE SHIPPED TO DEALERS AT NO CHARGE FOR EACH VEHICLE LISTED IN THE PRINTOUT FURNISHED TO YOU. ADDITIONAL KITS MAY BE OBTAINED FROM YOU ZONE OFFICE.

CLAIM INFORMATION

SUBMIT A PRODUCT CAMPAIGN CLAIM WITH THE INFORMATION INDICATED BELOW:

FAILURE LABOR LABOR *OTHER CODE OPERATION HOURS HOURS

00 V0860 .2 .1

DESCRIPTION: INSPECT ENGINE NUMBER ACCORDING TO STEP (1) OF THE SERVICE PROCEDURE, ENGINE NUMBER IS NOT WITHIN THE ENGINE PARAMETERS. NO FURTHER ACTION REQUIRED.

0 V0861 .3 .1

DESCRIPTION: INSPECT ENGINE NUMBER ACCORDING TO STEP (1) OF THE SERVICE PROCEDURE, ENGINE NUMBER WITHIN THE ENGINE PARAMETERS, ROTATE INJECTION PUMP AS OUTLINED IN THE SERVICE PROCEDURE OF THIS BULLETIN.

*CAMPAIGN ADMINISTRATIVE ALLOWANCE

DEALERS WILL AUTOMATICALLY RECEIVE THE LABOR ALLOWANCE BASED ON THE LABOR OPERATION PERFORMED.

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

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

REFER TO THE CURRENT CHEVROLET SERVICE POLICIES AND PROCEDURES MANUAL AND CLAIMS PROCESSING MANUAL FOR CAMPAIGN HANDLING AND ADMINISTRATIVE PROCEDURES.

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.