CAMPAIGN: CITATION BRAKE SYS. PROPORTIONER VALVE WITH M/T. Chevrolet Citation 1980

For 1990-2009 cars

# CAMPAIGN: CITATION BRAKE SYS. PROPORTIONER VALVE WITH M/T

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 TENERED 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 REASONABLEY EQUIVALENT VEHICLE AT NO CHARGE, OR TO A REFUND OF THE PURCHASE PRICE LESS A REASONABLE ALLOWANCE FOR DEPRECIATION. IN ORDER TO AVOID HAVING TO PROVIDE THESE BURDENSOME SOLUTIONS, EVERY EFFORT MUST BE MADE TO PROMPTLY SCHEDULE AN APPOINTMENT WITH EACH OWNER AND TO REPAIR HIS VEHICLE AS SOON AS POSSIBLE. AS YOU WILL SEE IN READING THE ATTACHED COPY OF THE LETTER WHICH IS BEING SENT TO OWNERS, THE OWNER IS BEING INSTRUCTED TO CONTACT THE NEAREST CHEVROLET ZONE OFFICE IF HIS DEALER DOES NOT REMEDY THE CONDITION WITHIN FIVE DAYS OF THE MUTUALLY AGREED UPON SERVICE DATE. IF THE CONDITION IS NOT REMEDIED WITHIN A REASONABLE TIME, HE IS 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 EXISTS IN SOME EARLY PRODUCTION 1980 CITATIONS EQUIPPED WITH MANUAL TRANSMISSION. UNDER CERTAIN VEHICLE OPERATING CONDITIONS, THE REAR BRAKES COULD LOCK UP PREMATURELY DURING HIGH DECELERATION BRAKING. THIS COULD RESULT IN LOSS OF VEHICLE CONTROL AND A VEHICLE CRASH COULD OCCUR WITHOUT PRIOR WARNING.

VEHICLES INVOLVED

INVOLVED ARE CERTAIN 1980 CHEVROLET CITATIONS WITH MANUAL TRANSMISSIONS WITHIN THE FOLLOWING VEHICLE BREAKPOINTS:

ASSEMBLY PLANT FROM THROUGH OKLAHOMA CITY A6100014 A6126044

WILLOW RUN AW100004 AW166023

TARRYTOWN AT100001 AT187719

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

1. OPEN VEHICLE HOOD AND INSPECT THE BRAKE PROPORTIONER VALVES. REFER TO FIGURE 1.

2. IF VALVES ARE DESIGN 2 (ALUMINUM), NO FURTHER ACTION IS REQUIRED EXCEPT TO INSTALL CAMPAIGN IDENTIFICATION LABEL, STEP 6.

3. IF VALVES ARE DESIGN 1 (STEEL), BOTH VALVES ARE TO BE REPLACED WITH VALVE KITS P/N 18006626 AND 18006627. PLACE MATERIAL UNDER CONNECTIONS TO PROTECT UNDER HOOD PARTS FROM BRAKE FLUID. REFER TO FIGURE 2 FOR REPLACEMENT PROCEDURE.

4. BLEED BRAKE SYSTEM AS FOLLOWS:

A) IF THE CAR IS EQUIPPED WITH POWER BRAKES, REMOVE THE VACUUM RESERVE BY APPLYING THE BRAKES SEVERAL TIMES.

B) FILL THE MASTER CYLINDER RESERVIORS WITH BRAKE FLUID AND KEEP AT LEAST ONE-HALF FULL OF FLUID DURING THE BLEEDING OPERATION.

C) FIRMLY DEPRESS THE BRAKE PEDAL SLOWLY AND HOLD.

D) LOOSEN RIGHT REAR BRAKE PIPE TUBE NUT AT PROPORTIONER VALVE TO PURGE AIR. REFER TO FIGURE 3. TIGHTEN NUT AND THEN SLOWLY RELEASE BRAKE PEDAL. WAIT 15 SECONDS.

E) REPEAT STEP D AT EACH BRAKE PIPE TUBE NUT IN THE FOLLOWING SEQUENCE: - LEFT REAR TUBE NUT TO PROPORTIONER - LEFT FRONT TUBE NUT TO MASTER CYLINDER - RIGHT FRONT TUBE NUT TO MASTER CYLINDER

F) REPEAT BLEED PROCEDURE, B THRU E UNTIL ALL AIR IS REMOVED.

G) CHECK THE BRAKE PEDAL FOR "SPONGINESS" AND BRAKE WARNING LIGHT FOR INDICATION OF UNBALANCED PRESSURE. REPEAT BLEEDING OPERATION TO CORRECT. DO NOT MOVE CAR UNTIL A FIRM BRAKE PEDAL IS OBTAINED.

5. FILL MASTER CYLINDER.

6. INSTALL "CAMPAIGN IDENTIFICATION LABEL" ACCORDING TO THE INSTRUCTIONS OUTLINED IN THIS BULLETIN.

PARTS INFORMATION

THE PARTS REQUIRED TO COMPLETE THIS CAMPAIGN ON ALL INVOLVED VEHICLES CAN BE ORDERED FROM GENERAL MOTORS WAREHOUSING AND DISTRIBUTION DIVISION AS FOLLOWS:

PART NUMBER QUANTITY DESCRIPTION

18006626 (10 MM FRONT) 1 VALVE KIT WITH SEAL, RR

18006627 (13 MM REAR) 1 VALVE KIT WITH SEAL, LR

TO INSURE THESE PARTS WILL BE OBTAINED AS SOON AS POSSIBLE, THEY SHOULD BE ORDERED FROM GMWDD ON A C.I.O. ORDER WITH NO SPECIAL INSTRUCTION CODE BUT ORDER ON AN ADVISE CODE (2).

CLAIM INFORMATON

SUBMIT A PRODUCT CLAIM WITH THE INFORMATION INDICATED BELOW DEPENDING UPON THE INSPECTION/CORRECTION PERFORMANCE:

PARTS FAILED PARTS FAILURE LABOR LABOR *OTHER COUNT PART NO. ALLOWANCE CODE OPERATION HOURS HOURS

00 V0950 .2 .1

DESCRIPTION: INSPECT BRAKE PROPORTIONER VALVES, IF DESIGN 2 (ALUMINUM) NO FURTHER ACTION REQUIRED.

2 18006626 ** 00 V0951 .4 .1

DESCRIPTION: INSPECT BRAKE PROPORTIONER VALVES, IF DESIGN 1 (STEEL) REPLACE ACCORDING TO THE INSTRUCTIONS OUTLINED IN THIS BULLETIN.

* CAMPAIGN ADMINISTRATIVE ALLOWANCE ** THE PARTS ALLOWANCE SHOULD BE THE SUM TOTAL OF THE CURRENT GMWDD DEALER NET PLUS 30% FOR THE TWO PROPORTIONER VALVES WHEN REQUIRED. PLUS DEALER WILL AUTOMATICALLY RECEIVE CREDIT FOR SIX (6) OUNCES OF BRAKE FLUID.

DEALERS WILL AUTOMATICALLY RECEIVE THE CORRECT PARTS AND 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.