CAMPAIGN: CRUISE CONTROL SERVO BUSHING

SUBJECT: CRUISE CONTROL SERVO BUSHING 1984-88 B, G, D, AND E BODIES WITH 4.3, 5.0, AND 4.3 ENGINES AND CRUISE CONTROL

TO: ALL CHEVROLET DEALERS

THIS INFORMATION REVISES THE "VEHICLES INVOLVED" SECTION OF CAMPAIGN BULLETIN 88C25 PREVIOUSLY MAILED.

THE NATIONAL TRAFFIC AND MOTOR VEHICLE SAFETY ACT, AS AMENDED, PROVIDES THAT EACH VEHICLE WHICH IS SUBJECT TO A RECALL CAMPAIGN OF THIS TYPE MUST BE ADEQUATELY REPAIRED WITHIN A REASONABLE TIME AFTER THE OWNER HAS TENDERED IT FOR REPAIR. A FAILURE TO REPAIR WITHIN SIXTY (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 MUST BE MADE TO PROMPTLY SCHEDULE AN APPOINTMENT WITH EACH OWNER AND TO REPAIR THEIR VEHICLE AS SOON AS POSSIBLE. AS YOU WILL SEE IN READING THE ATTACHED COPY OF THE LETTER THAT IS BEING SENT TO OWNERS, THE OWNERS ARE BEING INSTRUCTED TO CONTACT THE CHEVROLET CUSTOMER ASSISTANCE CENTER IF THEIR DEALER DOES NOT REMEDY THE CONDITION WITHIN FIVE (5) DAYS OF THE MUTUALLY AGREED UPON SERVICE DATE. IF THE CONDITION IS NOT REMEDIED WITHIN A REASONABLE TIME, THEY ARE INSTRUCTED ON HOW TO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION.

DEFECT INVOLVED

GENERAL MOTORS HAS DETERMINED THAT A DEFECT WHICH RELATES TO MOTOR VEHICLE SAFETY MAY EXIST IN CERTAIN 1984-88 VEHICLES EQUIPPED WITH CRUISE CONTROL (RPO K34) ON CERTAIN GASOLINE AND DIESEL ENGINES. A SMALL NYLON BUSHING IN THE CRUISE CONTROL SERVO BAIL (BRACKET) MAY SLIP OUT OF PLACE. THIS WILL NOT AFFECT THE OPERATION OF THE CRUISE CONTROL, BUT IT MAY CAUSE INTERMITTENT INCREASES IN ENGINE SPEED OR DIESELING (ENGINE RUN-ON WITH IGNITION OFF).

IF THE VEHICLE IS NOT SERVICED, AND THE NYLON BUSHING REMAINS OUT OF PLACE, THE SERVO ROD ASSEMBLY COULD WEAR THROUGH THE BAIL. IF THE ROD WEARS THROUGHT HE BAIL, IT MAY CATCH ON OTHER ENGINE COMPONENTS AND POSSIBLY RESULT IN A STUCK THROTTLE. ALTHOUGH THE VEHICLE CAN STILL BE STOPPED WITH THE SERVICE BRAKE, AN UNEXPECTED LOSS OF ACCELERATOR CONTROL COULD RESULT IN VEHICLE CRASH.

TO PREVENT THE POSSIBILITY OF THIS CONDITION OCCURRING, DEALERS ARE TO INSTALL A BUSHING KIT ON THE CRUISE CONTROL SERVO BAIL. THE CRUISE CONTROL SERVO ASSEMBLY IS NOT AUTHORIZED AS A REPLACEMENT TO CORRECT FOR A MISSING OR OUT OF PLACE BUSHING. ALSO, IF OTHER REPAIRS ARE NEEDED TO THE CRUISE CONTROL SYSTEM, AND THE VEHICLE IS OUT OF WARRANTY, THE REPAIRS WOULD BE AT OWNER'S EXPENSE.

VEHICLES INVOLVED

INVOLVED ARE CERTAIN 1984-88 B, G, D, AND E BODY VEHICLES EQUIPPED WITH CRUISE CONTROL (RPO K34) AND ENGINES (5.7L DIESEL VIN CODE N, 4.3L DIESEL VIN CODE V, 5.0L GAS VIN CODE Y, AND 5.0L GAS VIN CODE 9) AS LISTED BELOW.

ENGINE MODEL YEAR VIN CODE FROM THROUGH

CHEVROLET

CAPRICE 1984 N SOP EOP MONTE CARLO 1984 N SOP EOP EL CAMINO 1984 N SOP EOP CAPRICE 1985 N SOP EOP CAPRICE 1986 Y SOP EOP CAPRICE 1987 Y SOP EOP CAPRICE 1988 Y JA100004 JA147233 CAPRICE 1988 Y JR100008 JR156980

GMC

CAMALLERO 1984 N ER500074 ER502496

OLDSMOBILE

G 1984 N,Y,9,V SOP EOP B 1984 N,Y SOP EOP B-WGN 1984 N,Y SOP EOP D 1984 N,Y SOP EOP E 1984 N,Y SOP EOP G 1985 N,Y,9 SOP EOP B 1985 N,Y SOP EOP B-WGN 1985 N,Y SOP EOP E 1985 N,Y SOP EOP G 1986/7 Y,9 SOP EOP B-WGN 1986/7 Y SOP EOP G 1988 Y SOP EOP B-WGN 1988 Y SOP JR306803

BUICK

G 1984 V SOP EOP B 1984 Y,N SOP EOP D 1984 Y SOP EOP E 1984 Y,N SOP EOP B 1985 Y,N SOP EOP E 1985 Y,N SOP EOP G 1986 Y SOP EOP B 1986 Y SOP EOP G 1987 Y SOP EOP B 1988 Y SOP JA404650

PONTIAC

G 1984 N EB200005 EB250584 G 1984 N E2205277 E2306770 B 1984 N EX202262 EX225153 B 1984 N E9701426 E9743876 B 1985 N FX200001 FX268502 B 1986 Y GX201816 GX285088 B 1987 Y HA200001 HA207717 B 1987 Y HX200001 HX211350 B 1988 Y JA200001 JA202809 B 1988 Y JA200001 JX200001

CADILLAC

D 1984 N SOP EOP E 1984 N SOP EOP D 1985 N SOP EOP E 1985 N SOP EOP D 1986 Y SOP EOP D 1987 Y SOP EOP D 1988 Y J9700001 J9735104 D 1988 Y JR750001 JR751072

INVOLVED VEHICLES HAVE BEEN IDENTIFIED BY VIN COMPUTER LISTINGS. COMPUTER LISTINGS CONTAIN THE COMPLETE VIN, OWNER NAME AND ADDRESS DATA, AND ARE FURNISHED TO 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 HAS NO INVOLVED VEHICLES CURRENTLY ASSIGNED.

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 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 CORRECTION ACCORDING TO INSTRUCTIONS CONTAINED IN THIS BULLETIN.

PARTS INFORMATION

PARTS REQUIRED TO COMPLETE THIS CAMPAIGN ARE TO BE OBTAINED FROM GMSPO. TO ENSURE 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 ON AN ADVISE CODE 2.

QUANTITY/ PART NUMBER DESCRIPTION VEHICLE

25111444 BUSHING KIT - CRUISE CONTROL 1

SERVICE PROCEDURE

NOTICE: FIGURES 1 THROUGH 4 ARE FOR GASOLINE ENGINE. ALTHOUGH THE SERVO ROD ASSEMBLY HAS A DIFFERENT SHAPE AND THE SERVO MAY BE ROTATED ON DIESELS, THE SERVICE PROCEDURE REMAINS THE SAME.

1. RAISE HOOD AND INSTALL A FENDER COVER ON THE LEFT FENDER.

2. EXAMINE THE CRUISE CONTROL SERVO. IF THE BUSHING IN THE BAIL OF HTE SERVO LOOKS LIKE IT WAS FORMED IN PLACE (A PERMANENT PART OF THE BAIL ASSEMBLY - SEE FIGURE 1.), GO DIRECTLY TO STEP (12) AND INSTALL A CAMPAIGN IDENTIFICATION LABEL.

IF THE BUSHING IS A "SNAP-IN" BUSHING (WITH TABS) AS SHOWN IN VIEW "B" OF FIGURE 2, CONTINUE TO STEP (3).

3. DISCONNECT ANY ELECTRICAL AND HOSE CONNECTIONS, IF NECESSARY, TO THE AIR CLEANER AND REMOVE AIR CLEANER ASSEMBLY.

4. BEFORE REMOVING THE SPRING RETAINER FROM ITS ADJUSTMENT HOLE IN SERVO ROD ASSEMBLY, SCRIBE A MARK ON THE ROD NEXT TO THE HOLE TO IDENTIFY WHERE THE SPRING RETAINER IS TO BE REINSTALLED (SEE FIGURE 2).

5. REMOVE THE SPRING RETAINER. DO NOT REMOVE THE "Z" PIN.

6. ALIGN THE "Z" PIN WITH THE ROD AS SHOWN IN VIEW "A" OF FIGURE 2., THEN SLIDE THE ROD REARWARD OUT OF THE BAIL (IT MAY ALSO BE NECESSARY TO SLIGHTLY COLLAPSE THE SERVO DIAPHRAGM AND MOVE THE BAIL FORWARD).

PINCH THE BUSHING FLANGE WITH A PAIR OF PLIERS AND REMOVE THE BUSHING FROM THE BAIL. THE BUSHING MAY NOT BE IN THE BAIL HOLE AS ARIGINALLY INSTALLED; IT MAY BE FREE TO MOVE ON THE SERVO ROD ASSEMBLY. REMOVE THE OLD BUSHING AND REPLACE AS NOTED BELOW.

7. IF THE SERVO BAIL HOLE HAS A BURR, FILE OFF THE BURR SO THAT THE BAIL SURFACE IS FLAT ON BOTH SIDES.

8. OBTAIN BUSHING KIT (P/N 25111444). INSTALL THE BUSHING ONTO THE BAIL AS SHOWN IN FIGURE 3, SO THAT THE TWO TABS SNAP FIRMLY IN PLACE. IF THE BAIL IS BENT (OR TWISTED) SO THAT THE NEW BUSHING WILL NOT EASILY SNAP INTO PLACE ON THE BAIL (AS SHOWN IN FIGURE 3), STRAIGHTEN THE BAIL AS NECESSARY.

9. INSTALL THE CLIP OVER THE BUSHING AND BAIL AS SHOWN IN FIGURES 3 AND 4.

REINSTALL THE SERVO ROD ASSEMBLY THROUGH THE NEW BUSHING BY POSITIONING THE "Z" PIN AS SHOWN IN VIEW "A" OF FIGURE 2. REINSTALL THE SPRING RETAINER IN THE ORIGINAL (MARKED) HOLE IN THE ROD, POINTING THE SPRING RETAINER IN THE DIRECTION SHOWN IN FIGURE 4.

IF THE SERVO ROD ASSEMBLY IS MISSING THE "Z" PIN, INSTALL A SECOND SPRING RETAINER IN THE END HOLE NORMALLY OCCUPIED BY THE "Z" PIN.

10. ENSURE THAT THE THROTTLE MECHANISM WILL RETURN FULLY TO THE IDLE POSITION.

11. REINSTALL THE AIR CLEANER ASSEMBLY AND RECONNECT HOSE AND ELECTRICAL CONNECTIONS AS MAY BE APPROPRIATE.

12. INSTALL A CAMPAING IDENTIFICATION LABEL, REMOVE FENDER COVER FROM LEFT FENDER, AND CLOSE HOOD.

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 FIVE (5) DIGIT DEALER CODE OF THE DEALER PERFORMING THE CAMPAIGN SERVICE. THIS INFORMATION MAY BE INSERTED WITH A TYPEWRITER OR A 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.

CLAIM INFORMATION

SUBMIT A PRODUCT CAMPAIGN CLAIM WITH THE INFORMATION INDICATED BELOW: * PART FAILED PARTS LABOR LAB OTH REPAIR PERFORMED COUNT PART NO. ALLOW CC-FC OP. HRS HRS

INSPECT SERVO SK-00 V5470 0.2 0.1 BIAL ONLY

INSPECT SERVO BAIL/ 1 25111444 ** SK-00 V5471 0.2 0.1 INSTALL BUSH. KIT

* CAMPAIGN ADMINISTRATIVE ALLOWANCE ** 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 OPERATION PERFORMED.

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

**CHEVROLET DISCLAIMER**

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.