CAMPAIGN: REAR AXLE HYDRAULIC BRAKE TUBES MAY FAIL

SUBJECT: REAR AXLE HYDRAULIC BRAKE TUBES MAY FAIL 1988 C6D042 MEDIUM DUTY CONVENTINAL MODEL TRUCKS EQUIPPED WITH NEWAY AIR RIDE REAR AXLE SUSPENSION (RPO GPC)

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 NEAREST GMC ZONE OFFICE IF THE 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 1988 MEDIUM DUTY CONVENTIONAL MODEL 6000 SERIES GMC TRUCKS SOLD TO U-HAUL INTERNATIONAL, INC. AND EQUIPPED WITH NEWAY AIR RIDE REAR AXLE SUSPENSION, RPO GPC. THE REAR AXLE BRAKE TUBES (EITHER SIDE) CAN FATIGUE, RESULTING IN A LOSS OF FLUID IN THE REAR BRAKE SYSTEM AND REDUCED BRAKING CAPABILITY. THESE VEHICLES ARE EQUIPPED WITH A DUAL BRAKING SYSTEM; PART OF THE SYSTEM WILL STILL WORK AND ALLOW THE VEHICLE TO BE STOPPED, BUT OVER A GREATER DISTANCE. A BRAKE WARNING LIGHT WILL APPEAR AT THIS TIME ON THE INSTRUMENT PANEL. LOSS OF REAR BRAKING, AT A TIME WHEN MINIMUM STOPPING DISTANCE IS REQUIRED, COULD RESULT IN A VEHICLE CRASH, WITHOUT PRIOR WARNING.

TO PREVENT THE POSSIBILITY OF THIS CONDITION OCCURRING IT WILL BE NECESSARY TO INSTALL NEW BRAKE PIPE ASSEMBLIES WITH REDESIGNED MOUNTING BRACKETS ON ALL INVOLVED VEHICLES.

VEHICLES INVOLVED

INVOLVED ARE CERTAIN 1988 MEDIUM DUTY CONVENTIONAL C6D042 TRUCKS EQUIPPED WITH NEWAY AIR RIDE REAR SUSPENSION (GPC). THE SPECIFIC VEHICLES INVOLVED IN THIS CAMPAIGN HAVE ALL BEEN SOLD TO U-HAUL INTERNATIONAL, INC. VEHICLES INVOLVED WERE BUILT WITHIN THE FOLLOWING VIN BREAKPOINTS:

MODEL YEAR MODEL PLANT FROM THROUGH

1988 C6D042 PONTIAC JV525918 JV533133

THE SPECIFIC VEHICLES INVOLVED IN THIS CAMPAIGN HAVE BEEN IDENTIFIED BY VIN COMPUTER LISTINGS.

DEALER CAMPAIGN RESPONSIBILITY

DEALERS ARE TO PERFORM THE REQUIRED SERVICE DESCRIBED UNDER SERVICE PROCEDURE FOR 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.

OWNER NOTIFICATION

U-HAUL INTERNATIONAL, INC. WILL BE NOTIFIED OF THIS CAMPAIGN ON THEIR VEHICLES BY GMC TRUCK DIVISION (SEE COPY OF OWNER LETTER INCLUDED WITH THIS BULLETIN).

SERVICE INFORMATION

1. BLOCK THE FRONT WHEELS OF VEHICLE AND SET PARKING BRAKE.

2. REMOVE EXISTING BRAKE LINE BRACKETS (1) AND (2) FROM CALIPERS ON REAR AXLE AND DISCARD. SAVE ATTACHING HARDWARE. (FIGURE NO. 1).

3. REMOVE AND DISCARD EXISTING R.H. AND L.H. BRAKE HOSE/TUBE ASSEMBLIES (3) AND (4). IF EXISTING CLAMPS ARE DAMAGED OR DETERIORATED, DISCARD AND REPLACE THEM WITH NEW CLAMPS AS DETAINED IN PARTS INFORMATION.

4. INSTALL NEW BRACKETS (1) AND (2) AND NEW BRAKE HOSE/TUBE ASSEMBLIES (3) AND (4) AS SHOWN IN FIGURE NO. 1. TORQUE ALL FASTENERS AND TUBE FITTINGS TO VALUES SPECIFIED IN FIGURE NO. 1.

5. BLEED BRAKES AS DESCRIBED IN THE 1988 MEDIUM DUTY TRUCK SERVICE MANUAL, X-8833, SECTION 5A-PAGES 10 AND 11.

6. CHECK HOSE/TUBE ASSEMBLIES FOR LEAKS.

7. UNBLOCK THE FRONT WHEELS OF VEHICLE.

PARTS INFORMATION

THE FOLLOWING PARTS ARE REQUIRED TO COMPLETE THIS MODIFICATION AND ARE BEING SHIPPED DIRECT TO U-HAUL INTERNATIONAL, INC. IF A DEALER ENCOUNTERS A U-HAUL TRUCK REQUIRING THIS CAMPAIGN, THE FOLLOWING PARTS WILL BE FURNISHED BY U-HAUL:

PART NUMBER DESCRIPTION QUANTITY

15644748 BRACKET, BRAKE LINE L.H. 1 15644749 BRACKET, BRAKE LINT R.H. 1 15639893 HOSE/TUBE ASM., L.H. 1 15639894 HOSE/TUBE ASM., R.H. 1

THE FOLLOWING PARTS ARE "AS REQUIRED" PARTS AND ARE TO BE OBTAINED FROM GMSPO. TO ENSURE THAT THESE PARTS WILL BE OBTAINED IF NEEDED, THEY SHOULD BE ORDERED FROM GMSPO ON A C.I.O. ORDER WITH NO SPECIAL INSTRUCTION CODE, BUT ORDERED ON AN ADVISE CODE (2).

PART NUMBER DESCRIPTION QUANTITY

2044064 CLAMP, TUBE TO REAR OF AXLE HOUSING AR 2005404 CLAMP, TUBE TO TOP OF AXLE HOUSING AR 2039917 CLAMP, HOSE TO BRACKET AR 1052535 DELCO SUPREME II OR DOT-3 EQUIVALENT AR

WARRANTY INFORMATION

DEALERS SHOULD SUBMIT A WARRANTY CLAIM ON EACH VEHICLE COMPLETED UNDER THIS CAMPAIGN.

LABOR OPERATION **PARTS *TIME TROUBLE NUMBER DESCRIPTION ALLOWANCE ALLOWANCE CODE

V5280 INSTALL BRACKETS AND RIGHT $10.53 1.4 HRS 96 AND LEFT REAR BRAKE PIPES

* FOR DEALER TO RECEIVE ADMINISTRATIVE TIME ALLOWANCE ASSOCIATED WITH THIS CAMPAIGN, ADD 0.1 HOUR TO THE LABOR OPERATION TIME ALLOWANCE.

** THE $10.53 AMOUNT IDENTIFIED INT HE "PARTS ALLOWANCE" COLUMN ABOVE REPRESENTS 30% OF DEALER NET FOR PARTS THAT WERE FURNISHED BY GMC TRUCK DIVISION TO U-HAUL INTERNATIONAL, INC. THIS AMOUNT IS TO BE PLACED IN THE NET ITEM AMOUNT COLUMN OF THE CLAIM AND USE TYPE CODE "M".

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.

ADMINISTRATIVE PROCEDURE

PROCEDURES COVERING THIS CAMPAIGN ARE OUTLINED IN SECTION V OF YOUR DEALERSHIP'S "GM TRUCK CLAIMS PROCESSING MANUAL" #P 8819.

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.