CAMPAIGN:BRAKE CONTROL ELECTRICAL HARNESS CHAFING. GMC Truck GMC C-Series Medium Duty Truck C6/C7/C8 1998

NOTE: GM OF CANADA VERSION OF 98019 IS LOCATED BELOW THE US VERSION ______________________________________________________________________ REVISION: PRODUCT CAMPAIGNS 98019(A) JULY, 1998

THIS BULLETIN CANCELS AND REPLACES BULLETIN 98019 ISSUED APRIL, 1998. THE C SERIES POPULATION HAS BEEN EXPANDED AND B7 SCHOOL BUSES HAVE BEEN ADDED. ALL COPIES OF BULLETIN 98019 SHOULD BE DESTROYED. ______________________________________________________________________

PRODUCT CAMPAIGNS 98019(A) JULY, 1998

PRODUCT RECALL CAMPAIGN

PRODUCT SAFETY CAMPAIGN

SUBJECT: 98019 - BRAKE CONTROL ELECTRICAL HARNESS CHAFING

MODELS: 1998 CHEVROLET AND GMC MEDIUM DUTY C6 AND C7 SERIES TRUCKS AND B7 SCHOOL BUSES EQUIPPED WITH OPTIONS INTERIM CHANGE (CTF), AIR BRAKES (JE4), AND ABS (JE5)

THIS BULLETIN CANCELS AND REPLACES BULLETIN 98019 ISSUED APRIL, 1998. THE C SERIES POPULATION HAS BEEN EXPANDED AND B7 SCHOOL BUSES HAVE BEEN ADDED. ALL COPIES OF BULLETIN 98019 SHOULD BE DESTROYED.

THE HIGHWAY 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 CUSTOMER 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 CUSTOMER 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 REMEDIES, EVERY EFFORT MUST BE MADE TO PROMPTLY SCHEDULE AN APPOINTMENT WITH EACH CUSTOMER AND TO REPAIR THEIR VEHICLE AS SOON AS POSSIBLE. AS YOU WILL SEE IN READING THE ATTACHED COPY OF THE DIVISIONAL LETTER THAT IS BEING SENT TO CUSTOMERS, THE CUSTOMERS ARE BEING INSTRUCTED TO CONTACT THE APPROPRIATE 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 DECIDED THAT A DEFECT WHICH RELATES TO MOTOR VEHICLE SAFETY EXISTS IN CERTAIN 1998 CHEVROLET AND GMC MEDIUM DUTY C6 AND C7 SERIES TRUCKS AND B7 SCHOOL BUSES. SOME OF THESE VEHICLES EQUIPPED WITH AIR BRAKES (JE4) AND ANTI-LOCK BRAKE SYSTEMS (JE5), MAY EXHIBIT BRAKE CONTROL ELECTRICAL HARNESS CHAFING. THIS HARNESS, WHICH PROVIDES POWER TO THE FRONT BRAKE MODULATOR VALVES, MAY BECOME GROUNDED DUE TO THIS CONDITION. SOME OF THE WIRES, WHEN GROUNDED, WILL ILLUMINATE A WARNING LIGHT ON THE INSTRUMENT PANEL AND SHUT OFF THE ABS FEATURE WITH THE FOUNDATION BRAKES STILL FUNCTIONING. HOWEVER, OTHER WIRES IN THE HARNESS WHEN GROUNDED, WILL ILLUMINATE A WARNING LIGHT ON THE INSTRUMENT PANEL, BUT RESULT IN NO AIR REACHING ONE, OR IN RARE INSTANCES, BOTH OF THE FRONT BRAKE CHAMBERS. THIS WOULD CAUSE REDUCED BRAKING CAPABILITY OF THE FRONT BRAKES, ALTHOUGH THE REAR BRAKES WOULD FUNCTION PROPERLY. PARTIAL LOSS OF BRAKING AT A TIME WHEN MINIMUM STOPPING DISTANCE WAS REQUIRED COULD RESULT IN A VEHICLE CRASH WITHOUT PRIOR WARNING.

TO PREVENT THE POSSIBILITY OF THIS CONDITION OCCURRING, DEALERS ARE TO INSPECT FOR CHAFING AND PROPER ROUTING OF THE WIRE HARNESS, AND REPAIR IF NECESSARY.

VEHICLES INVOLVED

INVOLVED ARE CERTAIN 1998 CHEVROLET AND GMC MEDIUM DUTY C6 AND C7 SERIES TRUCKS AND B7 SCHOOL BUSES EQUIPPED WITH OPTIONS INTERIM CHANGE (CTG), AIR BRAKES (JE4), AND ABS (JE5) AND BUILT WITHIN THE FOLLOWING VIN BREAKPOINTS:

YEAR DIVISION MODEL PLANT CODE FROM THROUGH 1998 CHEVROLET C6/7 JANESVILLE "J" WJ108386 WJ110771 1998 CHEVROLET B7 JANESVILLE "J" WJ109382 WJ110697 1998 GMC C6/7 JANESVILLE "J" WJ506287 WJ516339 1998 GMC B7 JANESVILLE "J" WJ510414 WJ516307

IMPORTANT: DEALERS SHOULD CONFIRM VEHICLE ELIGIBILITY THROUGH VISS (VEHICLE INFORMATION SERVICE SYSTEM) OR SERVICENET (GMC ONLY) PRIOR TO BEGINNING CAMPAIGN REPAIRS. NOT ALL VEHICLES WITHIN THE ABOVE BREAKPOINTS MAY BE INVOLVED.

THE ADDITIONAL POPULATION OF INVOLVED VEHICLES HAVE BEEN IDENTIFIED BY VEHICLE IDENTIFICATION NUMBER. COMPUTER LISTINGS CONTAINING THE COMPLETE VEHICLE IDENTIFICATION NUMBER, CUSTOMER NAME AND ADDRESS DATA, OF THE ADDITIONAL POPULATION, HAVE BEEN PREPARED, AND ARE BEING FURNISHED TO INVOLVED DEALERS WITH THE CAMPAIGN BULLETIN. THE CUSTOMER NAME AND ADDRESS DATA FURNISHED WILL ENABLE DEALERS TO FOLLOW-UP WITH CUSTOMERS INVOLVED IN THIS CAMPAIGN. ANY DEALER NOT RECEIVING A COMPUTER LISTING WITH THE CAMPAIGN BULLETIN HAS NO ADDITIONAL INVOLVED VEHICLES CURRENTLY ASSIGNED.

THESE DEALER LISTINGS MAY CONTAIN CUSTOMER 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.

PARTS INFORMATION

PARTS REQUIRED TO COMPLETE THIS CAMPAIGN ARE TO BE OBTAINED FROM GENERAL MOTORS SERVICE PARTS OPERATIONS (GMSPO). PLEASE REFER TO YOUR "INVOLVED VEHICLES LISTING" PRIOR TO ORDERING REQUIREMENTS. NORMAL ORDERS SHOULD BE PLACED ON A DRO = DAILY REPLENISHMENT ORDER. AN EMERGENCY REQUIREMENT SHOULD BE ORDERED ON A CSO = CUSTOMER SPECIAL ORDER.

PART NUMBER DESCRIPTION QUANTITY/ VEHICLE

8919355 CONDUIT - 15 FOOT ROLL 6" IF REQ'D 11509086 TIE STRAP 1-3 IF REQ'D

NOTE: PART NUMBER 8919355 IS A FIFTEEN FOOT ROLL AND WILL REPAIR 30 VEHICLES.

CUSTOMER NOTIFICATION

CUSTOMERS WILL BE NOTIFIED OF THIS CAMPAIGN ON THEIR VEHICLES BY GENERAL MOTORS (SEE COPY OF TYPICAL CUSTOMER LETTER INCLUDED WITH THIS BULLETIN - ACTUAL DIVISIONAL LETTER MAY VARY SLIGHTLY).

DEALER CAMPAIGN RESPONSIBILITY

WHEN A VEHICLE HAS BEEN IDENTIFIED AS INVOLVED, THE CUSTOMER'S VEHICLE IS TO BE TOWED TO YOUR DEALERSHIP. INVOLVED VEHICLES ARE NOT TO BE DRIVEN UNTIL THE CAMPAIGN HAS BEEN PERFORMED.

ALL UNSOLD NEW VEHICLES IN DEALERS' POSSESSION AND SUBJECT TO THIS CAMPAIGN MUST NOT BE DRIVEN AND MUST BE HELD AND INSPECTED/REPAIRED PER THE SERVICE PROCEDURE OF THIS CAMPAIGN BULLETIN BEFORE CUSTOMERS TAKE POSSESSION OF THESE VEHICLES.

DEALERS ARE TO SERVICE ALL VEHICLES SUBJECT TO THIS CAMPAIGN AT NO CHARGE TO CUSTOMERS, REGARDLESS OF MILEAGE, AGE OF VEHICLE, OR OWNERSHIP, FROM THIS TIME FORWARD.

CUSTOMERS WHO HAVE RECENTLY PURCHASED VEHICLES SOLD FROM YOUR VEHICLE INVENTORY, AND FOR WHICH THERE IS NO CUSTOMER INFORMATION INDICATED ON THE DEALER LISTING, ARE TO BE CONTACTED BY THE DEALER. ARRANGEMENTS ARE TO BE MADE TO MAKE THE REQUIRED CORRECTION ACCORDING TO THE INSTRUCTIONS CONTAINED IN THIS BULLETIN. THIS COULD BE DONE BY MAILING TO SUCH CUSTOMERS A COPY OF THE APPROPRIATE DIVISIONAL CUSTOMER LETTER ACCOMPANYING THIS BULLETIN. CAMPAIGN FOLLOW-UP CARDS SHOULD NOT BE USED FOR THIS PURPOSE, SINCE THE CUSTOMER MAY NOT AS YET HAVE RECEIVED THE NOTIFICATION LETTER.

IN SUMMARY, WHENEVER A VEHICLE SUBJECT TO THIS CAMPAIGN ENTERS YOUR VEHICLE INVENTORY, OR IS IN YOUR DEALERSHIP FOR SERVICE IN THE FUTURE, PLEASE TAKE THE STEPS NECESSARY TO BE SURE THE CAMPAIGN CORRECTION HAS BEEN MADE BEFORE SELLING OR RELEASING THE VEHICLE.

SERVICE PROCEDURE

1. LOCATE THE ABS BRAKE HARNESS ON THE BACK OF THE FRONT FRAME RAIL, JUST ABOVE THE BRAKE MODULATOR VALVE.

2. THE HARNESS SHOULD BE ROUTED BETWEEN THE MODULATOR VALVE AND THE CROSSMEMBER AND TIE STRAPPED TO THE AIR PIPE NEAR THE MODULATOR VALVE. CHECK FOR MISSING TIE STRAPS JUST ABOVE THE VALVE, AND ABOUT 12" (300 MM) ON EACH SIDE. IF THE ROUTING IS CORRECT, THE STRAPS ARE IN PLACE, AND THE HARNESS IS SECURELY POSITIONED (THE HARNESS SHOULD NOT COME NEAR THE ENGINE CRANK PULLEY), NO FURTHER ACTION IS REQUIRED. PROCEED TO STEP 5.

3. IF THE HARNESS IS MISROUTED OR NOT SECURED, CHECK THE CONDUIT AND THE WIRING FOR DAMAGE FROM CONTACT WITH THE ENGINE CRANK PULLEY. IF ONLY THE CONDUIT IS DAMAGED, REPLACE THE DAMAGED SECTION WITH NEW CONDUIT. TAPE THE CONDUIT TO THE EXISTING CONDUIT, AND THEN PROPERLY ROUTE AND TIE STRAP THE HARNESS IN PLACE. PROCEED TO STEP 5.

4. IF THE WIRING IS DAMAGED, REPAIR OR REPLACE ANY DAMAGED SECTIONS. BE SURE TO SOLDER ALL CONNECTIONS, AND USE SHRINK TUBING OVER THE SPLICES TO INSURE THAT THE WIRES WILL BE WATER TIGHT. REPLACE THE DAMAGED CONDUIT SECTION WITH NEW CONDUIT. TAPE THE CONDUIT TO THE EXISTING CONDUIT, AND THEN PROPERLY ROUTE AND TIE STRAP THE HARNESS IN PLACE.

IMPORTANT: ONE PAIR OF WIRES IN THE HARNESS IS A TWISTED PAIR. WHEN REPAIRING THESE WIRES, THE TWIST MUST BE MAINTAINED TO PREVENT ELECTRO-MAGNETIC INTERFERENCE (EMI). 12 TWISTS PER INCH SHOULD BE USED.

5. INSTALL THE GM CAMPAIGN IDENTIFICATION LABEL.

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 CAMPAIGN NUMBER AND 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 BY THE CUSTOMER FOR PERIODIC SERVICING. WHEN INSTALLING THE CAMPAIGN IDENTIFICATION LABEL, BE SURE TO PULL THE TAB TO ALLOW ADHESION OF THE CLEAR PROTECTIVE COVERING. ADDITIONAL CAMPAIGN IDENTIFICATION LABELS CAN BE OBTAINED FROM VISPAC INCORPORATED BY CALLING 1-800-269-5100 (MONDAY-FRIDAY, 8:00 A.M. TO 4:30 P.M. EST). ASK FOR ITEM NUMBER S-1015 WHEN ORDERING.

APPLY THE "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 LABOR NET REPAIR PERFORMED COUNT PART NO. ALLOW CC-FC OP * HOURS ITEM

INSPECT AND ADD TIE STRAPS, IF REQ'D --- --- N/A MA-96 V0161 0.3 **

INSPECT, ADD TIE STRAPS, AND REPAIR CONDUIT --- --- N/A MA-96 V0162 0.5 ***

INSPECT, ADD TIE STRAPS, REPAIR WIRE AND CONDUIT --- --- N/A MA-96 V0163 0.7 ****

* FOR CAMPAIGN ADMINISTRATIVE ALLOWANCE, ADD 0.1 HOURS TO THE "LABOR HOURS".

** THE AMOUNT IDENTIFIED IN THE "NET ITEM" COLUMN SHOULD REPRESENT THE SUM TOTAL OF THE CURRENT GMSPO DEALER NET PRICE PLUS 40% FOR THE TIE STRAPS, IF REQUIRED, NOT TO EXCEED $1.26, AND THE CUSTOMARY TOWING CHARGE TO HAVE A DELIVERED VEHICLE TOWED TO YOUR DEALERSHIP.

*** THE AMOUNT IDENTIFIED IN THE "NET ITEM" COLUMN SHOULD REPRESENT THE SUM TOTAL OF THE CURRENT GMSPO DEALER NET PRICE PLUS 40% FOR TIE STRAPS AND CONDUIT NEEDED TO PERFORM THE REQUIRED REPAIRS, NOT TO EXCEED $2.05, AND THE CUSTOMARY TOWING CHARGE TO HAVE A DELIVERED VEHICLE TOWED TO YOUR DEALERSHIP.

**** THE AMOUNT IDENTIFIED IN THE "NET ITEM" COLUMN SHOULD REPRESENT THE SUM TOTAL OF THE CURRENT GMSPO DEALER NET PRICE PLUS 40% FOR THE TIE STRAPS, CONDUIT, AND SHRINK TUBING NEEDED TO PERFORM THE REQUIRED REPAIRS, NOT TO EXCEED $2.18, AND THE CUSTOMARY TOWING CHARGE TO HAVE A DELIVERED VEHICLE TOWED TO YOUR DEALERSHIP.

REFER TO THE GENERAL MOTORS CORPORATION CLAIMS PROCESSING MANUAL FOR DETAILS ON PRODUCT CAMPAIGN CLAIM SUBMISSION.

FIGURES: 0

GM BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THESE 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 TOOLS, EQUIPMENT, 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 YOUR DEALER/RETAILER FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

98019

(SAMPLE OF NOTIFICATION USED)

JULY, 1998

DEAR CHEVROLET/GMC CUSTOMER:

THIS NOTICE IS SENT TO YOU IN ACCORDANCE WITH THE REQUIREMENTS OF THE NATIONAL TRAFFIC AND MOTOR VEHICLE SAFETY ACT.

REASON FOR THIS RECALL: GENERAL MOTORS HAS DECIDED THAT A DEFECT WHICH RELATES TO MOTOR VEHICLE SAFETY EXISTS IN CERTAIN 1998 CHEVROLET AND GMC MEDIUM DUTY C6 AND C7 SERIES TRUCKS AND B7 SCHOOL BUSES. SOME OF THESE VEHICLES EQUIPPED WITH AIR BRAKES AND ANTI-LOCK BRAKE SYSTEMS MAY EXHIBIT BRAKE CONTROL ELECTRICAL HARNESS CHAFING. THIS HARNESS, WHICH PROVIDES POWER TO THE FRONT BRAKE MODULATOR VALVES, MAY BECOME GROUNDED DUE TO THIS CONDITION. SOME OF THE WIRES, WHEN GROUNDED, WILL ILLUMINATE A WARNING LIGHT ON THE INSTRUMENT PANEL AND SHUT OFF THE ABS FEATURE WITH THE FOUNDATION BRAKES STILL FUNCTIONING. HOWEVER, OTHER WIRES IN THE HARNESS WHEN GROUNDED, WILL ILLUMINATE A WARNING LIGHT ON THE INSTRUMENT PANEL, BUT RESULT IN NO AIR REACHING ONE, OR IN RARE INSTANCES, BOTH OF THE FRONT BRAKE CHAMBERS. THIS WOULD CAUSE REDUCED BRAKING CAPABILITY OF THE FRONT BRAKES, ALTHOUGH THE REAR BRAKES WOULD FUNCTION PROPERLY. PARTIAL LOSS OF BRAKING AT A TIME WHEN MINIMUM STOPPING DISTANCE WAS REQUIRED COULD RESULT IN A VEHICLE CRASH WITHOUT PRIOR WARNING.

WHAT WILL BE DONE: TO PREVENT THE POSSIBILITY OF THIS CONDITION OCCURRING, YOUR CHEVROLET/GMC DEALER WILL INSPECT FOR CHAFING AND PROPER ROUTING OF THE WIRE HARNESS, AND REPAIR IF NECESSARY. DO NOT DRIVE YOUR VEHICLE TO THE DEALERSHIP. THIS SERVICE WILL BE PERFORMED FOR YOU AT NO CHARGE.

HOW LONG WILL THE REPAIR TAKE? THE LENGTH OF TIME REQUIRED TO PERFORM THIS INSPECTION AND SERVICE CORRECTION, IF REQUIRED, IS APPROXIMATELY 20-45 MINUTES. ADDITIONAL TIME MAY BE REQUIRED TO SCHEDULE AND PROCESS YOUR VEHICLE. IF YOUR DEALER HAS A LARGE NUMBER OF VEHICLES AWAITING SERVICE, THIS ADDITIONAL TIME MAY BE SIGNIFICANT. PLEASE ASK YOUR DEALER IF YOU WISH TO KNOW HOW MUCH ADDITIONAL TIME WILL BE NEEDED.

CONTACTING YOUR DEALER: PLEASE CONTACT YOUR DEALER AS SOON AS POSSIBLE TO ARRANGE TO HAVE YOUR VEHICLE TOWED INTO THE DEALERSHIP. PARTS ARE AVAILABLE AND INSTRUCTIONS FOR MAKING THIS CORRECTION HAVE BEEN SENT TO YOUR DEALER. PLEASE ASK YOUR DEALER IF YOU WISH TO KNOW HOW MUCH TIME WILL BE NEEDED TO SCHEDULE, PROCESS AND REPAIR YOUR VEHICLE. YOUR CHEVROLET/GMC DEALER IS BEST EQUIPPED TO OBTAIN PARTS AND PROVIDE SERVICES TO CORRECT YOUR VEHICLE AS PROMPTLY AS POSSIBLE. SHOULD YOUR DEALER BE UNABLE TO SCHEDULE A SERVICE DATE WITHIN A REASONABLE TIME, YOU SHOULD CONTACT THE GMC CUSTOMER ASSISTANCE CENTER AT 1-800-462-8782. THE DEAF, HEARING IMPAIRED, OR SPEECH IMPAIRED SHOULD CALL 1-800-462-8583 (UTILIZES TELECOMMUNICATION DEVICES FOR THE DEAF/TEXT TELEPHONES, TDD/TTY).

IF, AFTER CONTACTING THE GMC CUSTOMER ASSISTANCE CENTER, YOU ARE STILL NOT SATISFIED THAT WE HAVE DONE OUR BEST TO REMEDY THIS CONDITION WITHOUT CHARGE AND WITHIN A REASONABLE TIME, YOU MAY WISH TO WRITE THE ADMINISTRATOR, NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, 400 SEVENTH STREET SW, WASHINGTON, DC 20590 OR CALL 1- 800-424-9393 (WASHINGTON, DC RESIDENTS USE 202-366-0123).

CUSTOMER REPLY CARD: THE ENCLOSED CUSTOMER REPLY CARD IDENTIFIES YOUR VEHICLE. PRESENTATION OF THIS CARD TO YOUR DEALER WILL ASSIST IN MAKING THE NECESSARY CORRECTION IN THE SHORTEST POSSIBLE TIME. IF YOU NO LONGER OWN THIS VEHICLE, PLEASE LET US KNOW BY COMPLETING THE POSTAGE PAID REPLY CARD AND RETURNING IT TO US.

WE ARE SORRY TO CAUSE YOU THIS INCONVENIENCE; HOWEVER, WE HAVE TAKEN THIS ACTION IN THE INTEREST OF YOUR SAFETY AND CONTINUED SATISFACTION WITH OUR PRODUCTS.

CHEVROLET/PONTIAC-GMC GENERAL MOTORS CORPORATION

********************************************************************** GM OF CANADA VERSION ********************************************************************** PRODUCT CAMPAIGNS 98019 JULY 1998

PRODUCT RECALL CAMPAIGN

PRODUCT SAFETY CAMPAIGN

SUBJECT: CAMPAIGN 98019 BRAKE CONTROL ELECTRICAL HARNESS CHAFING

MODELS: 1998 CHEVROLET AND GMC MEDIUM DUTY C6 AND C7 SERIES TRUCKS AND B7 SCHOOL BUSES EQUIPPED WITH OPTIONS INTERIM CONTROL (CTF), AIR BRAKES (JE4), AND ABS (JE5)

DEFECT INVOLVED

GENERAL MOTORS OF CANADA LIMITED HAS DECIDED THAT A DEFECT WHICH RELATES TO MOTOR VEHICLE SAFETY EXISTS IN CERTAIN 1998 CHEVROLET AND GMC MEDIUM DUTY C6 AND C7 SERIES TRUCKS AND B7 SCHOOL BUSES. SOME OF THESE VEHICLES EQUIPPED WITH AIR BRAKES (JE4) AND ANTI-LOCK BRAKE SYSTEMS (JE5), MAY EXHIBIT BRAKE CONTROL ELECTRICAL HARNESS CHAFING. THIS HARNESS, WHICH PROVIDES POWER TO THE FRONT BRAKE MODULATOR VALVES, MAY BECOME GROUNDED DUE TO THIS CONDITION. SOME OF THE WIRES, WHEN GROUNDED, WILL ILLUMINATE A WARNING LIGHT ON THE INSTRUMENT PANEL AND SHUT OFF THE ABS FEATURE WITH THE FOUNDATION BRAKES STILL FUNCTIONING. HOWEVER, OTHER WIRES IN THE HARNESS WHEN GROUNDED, WILL ILLUMINATE A WARNING LIGHT ON THE INSTRUMENT PANEL, BUT RESULT IN NO AIR REACHING ONE, OR IN RARE INSTANCES, BOTH OF THE FRONT BRAKE CHAMBERS. THIS WOULD CAUSE REDUCED BRAKING CAPABILITY OF THE FRONT BRAKES, ALTHOUGH THE REAR BRAKES WOULD FUNCTION PROPERLY. PARTIAL LOSS OF BRAKING AT A TIME WHEN MINIMUM STOPPING DISTANCE WAS REQUIRED COULD RESULT IN A VEHICLE CRASH WITHOUT PRIOR WARNING.

TO PREVENT THE POSSIBILITY OF THIS CONDITION OCCURRING, DEALERS ARE TO INSPECT FOR CHAFING AND PROPER ROUTING OF THE WIRE HARNESS, AND REPAIR IF NECESSARY.

VEHICLES INVOLVED

INVOLVED, IN CANADA, ARE THE FOLLOWING TWENTY-FIVE (25) 1998 GMC MEDIUM DUTY C7 SERIES TRUCKS EQUIPPED WITH OPTIONS INTERIM CHANGE (CTF), AIR BRAKES (JE4), AND ABS (JE5):

1GDM7H1C0WJ514448 1GDP7H1C1WJ514164 1GDP7H1C7WJ514119

1GDM7H1C0WJ514689 1GDP7H1C2WJ514271 1GDP7H1C9WJ514283

1GDM7H1C2WJ514385 1GDP7H1C2WJ515629 1GDP7H1MXWJ514026

1GDM7H1C4WJ514761 1GDP7H1C3WJ514733 1GDP7H1M4WJ514698

1GDM7H1C6WJ514454 1GDP7H1C4WJ514076 1GDT7H4C0WJ513968

1GDM7H1C7WJ514480 1GDP7H1C5WJ514345 1GDT7H4C2WJ515074

1GDP7H1CXWJ514387 1GDP7H1C5WJ514412 1GDT7H4C6WJ515000

1GDP7H1CXWJ515328 1GDP7H1C5WJ515348 1GDT7H4C7WJ513952

1GDP7H1C0WJ514107

INVOLVED VEHICLES HAVE BEEN IDENTIFIED BY VEHICLE IDENTIFICATION NUMBER. COMPUTER LISTINGS CONTAINING THE COMPLETE VEHICLE IDENTIFICATION NUMBER, CUSTOMER NAME AND ADDRESS DATA HAVE BEEN PREPARED, AND ARE BEING FURNISHED TO INVOLVED DEALERS WITH THE CAMPAIGN BULLETIN. THE CUSTOMER NAME AND ADDRESS DATA FURNISHED WILL ENABLE DEALERS TO FOLLOW-UP WITH CUSTOMERS INVOLVED IN THIS CAMPAIGN. ANY DEALER NOT RECEIVING A COMPUTER LISTING WITH THE CAMPAIGN BULLETIN HAS NO INVOLVED VEHICLES CURRENTLY ASSIGNED.

THESE DEALER LISTINGS MAY CONTAIN CUSTOMER NAMES AND ADDRESSES OBTAINED FROM THE INTER-PROVINCIAL RECORDS. THE USE OF SUCH MOTOR VEHICLE REGISTRATION DATA FOR ANY OTHER PURPOSE IS A VIOLATION OF PROVINCIAL LAWS. ACCORDINGLY, YOU ARE URGED TO LIMIT THE USE OF THIS LISTING TO THE FOLLOW-UP NECESSARY TO COMPLETE THIS CAMPAIGN.

PARTS INFORMATION

PARTS REQUIRED TO COMPLETE THIS CAMPAIGN ARE TO BE OBTAINED FROM GENERAL MOTORS SERVICE PARTS OPERATIONS (GMSPO). PLEASE REFER TO YOUR "INVOLVED VEHICLES LISTING" PRIOR TO ORDERING REQUIREMENTS.

PART NUMBER DESCRIPTION QUANTITY/VEHICLE

8919355 CONDUIT-FLEXIBLE WIRING-POLYAMIDE - 13MM DIAMETER (4.58 METRE (FIFTEEN FOOT) ROLL OF CONDUIT) 152MM (6 INCHES) IF REQUIRED 11509086 TIE STRAP 1-3 IF REQUIRED

NOTE: PART NUMBER 8919355 IS A FIFTEEN FOOT ROLL AND WILL REPAIR 30 VEHICLES.

CUSTOMER NOTIFICATION

ALL CUSTOMERS OF RECORD AT THE TIME OF CAMPAIGN RELEASE ARE SHOWN ON THE ATTACHED COMPUTER LISTING AND HAVE BEEN NOTIFIED BY FIRST CLASS MAIL FROM GENERAL MOTORS (SEE COPY OF CUSTOMER LETTER INCLUDED WITH THIS BULLETIN).

DEALER CAMPAIGN RESPONSIBILITY

ALL UNSOLD NEW VEHICLES IN DEALER'S POSSESSION AND SUBJECT TO THIS CAMPAIGN MUST BE HELD AND INSPECTED/REPAIRED PER THE SERVICE PROCEDURE OF THIS CAMPAIGN BULLETIN BEFORE CUSTOMERS TAKE POSSESSION OF THESE VEHICLES.

DEALERS ARE TO SERVICE ALL VEHICLES SUBJECT TO THIS CAMPAIGN AT NO CHARGE TO CUSTOMERS, REGARDLESS OF MILEAGE, AGE OF VEHICLE, OR OWNERSHIP, FROM THIS TIME FORWARD.

IN SUMMARY, WHENEVER A VEHICLE SUBJECT TO THIS CAMPAIGN ENTERS YOUR VEHICLE INVENTORY, OR IS IN YOUR DEALERSHIP FOR SERVICE IN THE FUTURE, YOU MUST TAKE THE STEPS NECESSARY TO BE SURE THE CAMPAIGN CORRECTION HAS BEEN MADE BEFORE SELLING OR RELEASING THE VEHICLE.

SERVICE PROCEDURE

1. LOCATE THE ABS BRAKE HARNESS ON THE BACK OF THE FRONT FRAME RAIL, JUST ABOVE THE BRAKE MODULATOR VALVE.

4. IF THE WIRING IS DAMAGED, REPAIR OR REPLACE ANY DAMAGED SECTIONS. BE SURE TO SOLDER ALL CONNECTIONS, AND USE SHRINK TUBING OVER THE SPLICES TO ENSURE THAT THE WIRES WILL BE WATER TIGHT. REPLACE THE DAMAGED CONDUIT SECTION WITH NEW CONDUIT. TAPE THE CONDUIT TO THE EXISTING CONDUIT, AND THEN PROPERLY ROUTE AND TIE STRAP THE HARNESS IN PLACE.

IMPORTANT: ONE PAIR OF WIRES IN THE HARNESS IS A TWISTED PAIR. WHEN REPAIRING THESE WIRES, THE TWIST MUST BE MAINTAINED TO PREVENT ELECTRO-MAGNETIC INTERFERENCE (EMI). 12 TWISTS PER INCH SHOULD BE USED.

5. INSTALL CAMPAIGN IDENTIFICATION LABEL.

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 CAMPAIGN NUMBER AND 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.

INSERT CAMPAIGN NUMBER

INSERT DEALER CODE

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 BY THE CUSTOMER FOR PERIODIC SERVICING. ADDITIONAL CAMPAIGN IDENTIFICATION LABELS CAN BE OBTAINED FROM DGN BY CALLING 1-800-668-5539 (MONDAY-FRIDAY, 8:00 A.M. TO 5:00 P.M. EST). ASK FOR ITEM NUMBER GMP 91 WHEN ORDERING.

APPLY THE "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 LABOR NET REPAIR PERFORMED COUNT PART NO. ALLOW CC-FC OP * HOURS ITEM

INSPECT AND ADD TIE STRAPS, IF REQUIRED --- --- N/A MA-96 V0161 0.3 **

INSPECT, ADD TIE STRAPS, AND REPAIR CONDUIT --- --- N/A MA-96 V0162 0.5 ***

INSPECT, ADD TIE STRAPS, REPAIR WIRE AND CONDUIT --- N/A MA-96 V0163 0.7 ****

* FOR CAMPAIGN ADMINISTRATIVE ALLOWANCE, ADD 0.1 HOURS TO THE "LABOUR HOURS".

** THE AMOUNT IDENTIFIED IN THE "NET ITEM" COLUMN SHOULD REPRESENT THE SUM TOTAL OF THE CURRENT GMSPO DEALER NET PRICE PLUS 40% FOR THE TIE STRAPS, IF REQUIRED, NOT TO EXCEED $2.10, AND THE CUSTOMARY TOWING CHARGE TO HAVE A DELIVERED VEHICLE TOWED TO YOUR DEALERSHIP.

*** THE AMOUNT IDENTIFIED IN THE "NET ITEM" COLUMN SHOULD REPRESENT THE SUM TOTAL OF THE CURRENT GMSPO DEALER NET PRICE PLUS 40% FOR THE TIE STRAPS AND CONDUIT NEEDED TO PERFORM THE REQUIRED REPAIRS, NOT TO EXCEED $3.30, AND THE CUSTOMARY TOWING CHARGE TO HAVE A DELIVERED VEHICLE TOWED TO YOUR DEALERSHIP.

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

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