CAMPAIGN:LOAD LEVELING SUSPENSION SYSTEM MALF.
PRODUCT CAMPAIGNS 98035(A) OCTOBER, 1998
THIS BULLETIN CANCELS AND REPLACES CAMPAIGN BULLETIN 98035 SENT JUNE 11, 1998 VIA DCS MESSAGE NUMBER "WINS DCS197". THIS REVISED BULLETIN HAS THE FINAL CORRECTION. THE INTERIM PROCEDURE, WHICH WAS PUBLISHED IN THE JUNE DCS VERSION, IS NO LONGER TO BE PERFORMED ON VEHICLES. ALL COPIES OF BULLETIN 98035 SHOULD BE DESTROYED.
NOTE: CANADIAN VERSION OF 98035A IS LOCATED BELOW THE US VERSION
______________________________________________________________________
CUSTOMER SATISFACTION CAMPAIGN
SUBJECT: 98035(A) - LOAD LEVELING SUSPENSION SYSTEM MALFUNCTION
MODELS: 1998 GMC ENVOY
GENERAL MOTORS HAS DECIDED THAT CERTAIN 1998 GMC ENVOYS MAY EXHIBIT A CONDITION WHERE THE LOAD LEVELING HEIGHT SENSING DEVICE MALFUNCTIONS RESULTING IN RAISING THE REAR OF THE VEHICLE ABOUT 6 INCHES, AND/OR THE COMPRESSOR WILL SWITCH ON AND RUN CONTINUOUSLY.
TO PREVENT THE POSSIBILITY OF THIS CONDITION OCCURRING, DEALERS ARE TO INSTALL A NEW SENSOR KIT.
VEHICLES INVOLVED
INVOLVED ARE CERTAIN 1998 GMC ENVOYS BUILT WITHIN THE FOLLOWING VIN BREAKPOINTS:
YEAR DIVISION MODEL PLANT CODE FROM THROUGH 1998 GMC ENVOY MORAINE "2" SOP W2954321
IMPORTANT: DEALERS SHOULD CONFIRM VEHICLE ELIGIBILITY THROUGH VISS (VEHICLE INFORMATION SERVICE SYSTEM) OR SERVICENET PRIOR TO BEGINNING CAMPAIGN REPAIRS. NOT ALL VEHICLES WITHIN THE ABOVE BREAKPOINTS MAY BE INVOLVED.
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 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
IMPORTANT: AN INITIAL SUPPLY OF SENSOR KITS, EQUIVALENT TO 40% OF INVOLVED VEHICLES, WILL BE PRE-SHIPPED TO INVOLVED DEALERS OF RECORD. THIS PRE-SHIPMENT WILL OCCUR THE WEEK OF OCTOBER 5, 1998. PRE-SHIPPED PARTS WILL BE CHARGED TO DEALER'S OPEN PARTS ACCOUNT.
ADDITIONAL PARTS, IF REQUIRED, 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 88880023 SENSOR KIT 1
CUSTOMER NOTIFICATION
CUSTOMERS WILL BE NOTIFIED OF THIS CAMPAIGN ON THEIR VEHICLES BY GENERAL MOTORS (SEE COPY OF CUSTOMER LETTER INCLUDED WITH THIS BULLETIN).
DEALER CAMPAIGN RESPONSIBILITY
ALL UNSOLD NEW VEHICLES IN DEALERS' 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.
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
RELAY REMOVAL
1. DISCONNECT THE BATTERY NEGATIVE CABLE.
2. REMOVE THE TAIL GATE HEADER GARNISH MOLDING (FIGURE 1), DOOR SILL TRIM PLATE (FIGURE 2), AND THE RIGHT REAR BODY SIDE TRIM PANEL (FIGURE 3). REFER TO BODY SIDE TRIM PANEL REPLACEMENT IN INTERIOR TRIM SECTION 10A4 OF THE SERVICE MANUAL (GMT/98-ST-1).
3. DISCONNECT AND REMOVE THE ALC RELAY AND WIRE HARNESS AND DISCARD (FIGURE 4).
IMPORTANT: ACCESSORY INFLATOR CONTROL PANEL (FIGURE 7) ON/OFF SWITCH CAN BE REMOVED FROM THE TRIM PANEL, EASING THE WIRING HARNESS REPLACEMENT. THE ON/OFF SWITCHES MUST BE REMOVED FROM THE WIRING HARNESS AND RE-INSTALLED ON THE NEW WIRING HARNESS.
RELAY INSTALLATION PROCEDURE
1. INSTALL AND CONNECT THE ALC RELAY AND WIRING HARNESS (FIGURE 4) AND ON/OFF SWITCH (FIGURE 7) IN THE ACCESSORY INFLATOR CONTROL PANEL. REFER TO THE ALC SECTION 3 OF THE SERVICE MANUAL (GMT/98-ST-PNP).
2. DO NOT RE-INSTALL THE TAIL GATE HEADER GARNISH MOLDING, DOOR SILL TRIM PLATE, AND THE RIGHT REAR BODY SIDE TRIM PANEL (FIGURES 1, 2, AND 3) UNTIL AFTER THE FUNCTIONAL CHECK IS COMPLETED.
HEIGHT SENSOR ASSEMBLY REMOVAL PROCEDURE
1. RAISE AND SUITABLY SUPPORT THE VEHICLE.
2. REMOVE THE ALC SENSOR LINK (FIGURE 5, ITEM 1) FROM THE REAR DIFFERENTIAL BRACKET BALL STUD.
3. REMOVE THE ALC SENSOR LINK BALL STUD BRACKET FROM THE REAR DIFFERENTIAL (FIGURE 5, ITEM 2), AND DISCARD THE BALL STUD BRACKET.
4. DISCONNECT THE ALC SENSOR ASSEMBLY ELECTRICAL CONNECTOR (FIGURE 6, ITEM 1) AT THE SPARE TIRE CROSS MEMBER. USING A 10 MM SOCKET, REMOVE THE MOUNTING NUTS FROM THE ALC SENSOR ASSEMBLY FROM THE BRACKET (FIGURE 6, ITEM 2) AT THE SPARE TIRE CROSS MEMBER, AND DISCARD THE ALC SENSOR AND HARNESS ASSEMBLY. DO NOT REMOVE THE MOUNTING BRACKET FROM THE SPARE TIRE CROSS MEMBER.
HEIGHT SENSOR ASSEMBLY INSTALLATION
1. CONNECT THE ALC ELECTRICAL CONNECTOR (FIGURE 6, ITEM 1); BE SURE TO ENGAGE THE CONNECTOR AND CHRISTMAS TREE FASTENER INTO THE BRACKET ASSEMBLY. INSTALL THE MOUNTING NUTS (3) TO THE ALC SENSOR BOLTS TO THE CROSS MEMBER BRACKET AND TORQUE TO 3.5 NM (31 IN.LB.).
2. INSTALL THE ALC SENSOR BALL STUD BRACKET TO THE REAR AXLE (FIGURE 5, ITEM 2). TORQUE THE BALL STUD BRACKET BOLT TO THE REAR AXLE COVER TO 27 NM (20 FT.LB.).
3. DO NOT CONNECT THE LINK FROM THE ALC SENSOR ARM TO THE BALL STUD ON THE DIFFERENTIAL BRACKET; WHICH WAS ADDED IN STEP 2 ABOVE. AT THIS POINT, FREE MOVEMENT OF THE ALC SENSOR ARM WILL BE REQUIRED IN THE FUNCTIONAL SYSTEM TEST WHICH FOLLOWS.
4. MANUALLY ROTATE THE ALC SENSOR ARM UPWARD AS CLOSE TO THE VEHICLE FLOOR AS POSSIBLE. USE A LARGE RUBBER BAND (APPROX. 6-7 INCHES LONG), INSTALL ONE END OVER THE SENSOR ARM (FIGURE 8, ITEM 1) AND WRAP IT AROUND OVER THE TOP OF THE SENSOR BRACKET (FIGURE 8, ITEM 2), AND DOWN AROUND OVER TOP OF THE ONE SCREW THAT IS NOT USED AS A MOUNTING POINT TO THE SENSOR BRACKET (FIGURE 8, ITEM 3). THE ALC SENSOR ARM SHOULD MAINTAIN ITS POSITION WHILE THE VEHICLE IS BEING LOWERED AND PREPARED FOR THE FUNCTIONAL CHECK OF THE ALC SYSTEM.
5. LOWER THE VEHICLE.
6. INSTALL THE 25 AMP FUSE FOR THE LD LEV IN THE FUSE BLOCK IN THE ENGINE COMPARTMENT, IF THE FUSE WAS PREVIOUSLY REMOVED IN THE INTERIM PROCEDURE.
FUNCTIONAL CHECK OF THE ALC SYSTEM
1. CONNECT THE NEGATIVE BATTERY CABLE.
2. TURN THE IGNITION KEY TO THE RUN POSITION.
3. RAISE AND SUPPORT THE VEHICLE IN A TRIM LEVEL POSITION. THE REAR SUSPENSION SHOULD BE UNSPRUNG, REAR WHEELS HANGING, AND THE VEHICLE SUPPORTED BY THE FRAME.
4. WITH THE ALC SENSOR ARM RUBBER BANDED IN THE UPWARD POSITION, THE SHOCKS SHOULD BE INFLATING OR INFLATED (APPROX. 60 SECONDS AFTER THE VEHICLE IS TURNED ON). IF THE SHOCKS FAIL TO INFLATE, REFER TO THE SUSPENSION SECTION OF THE SERVICE MANUAL (GMT/98-ST-PNP) FOR FURTHER DIAGNOSTIC PROCEDURES.
5. AFTER SUCCESSFUL SHOCK INFLATION, REMOVE THE RUBBER BAND HOLDING THE ARM UP, AND ATTACH THE LINK FROM THE ALC SENSOR ARM TO THE BALL STUD ON THE REAR AXLE DIFFERENTIAL BALL STUD BRACKET (FIGURE 1, ITEM 2).
NOTICE: WHEN RECONNECTING THE LINK, TAKE CARE NOT TO BEND OR BREAK THE ALC SENSOR ARM, AND MAKE SURE THE ALC SENSOR ARM AND LINK ARE PROPERLY ORIENTED. IMPROPER ORIENTATION WILL PREVENT THE ALC SYSTEM FROM OPERATING PROPERLY AND CAN RESULT IN DAMAGE TO THE ALC SENSOR (FIGURE 6, ITEM 3).
6. APPROXIMATELY 20 SECONDS AFTER THE ALC SENSOR ARM IS ROTATED DOWN FOR ATTACHMENT OF THE LINK TO THE DIFFERENTIAL BALL STUD BRACKET IN STEP 5, THE SYSTEM EXHAUST VALVE WILL TURN ON FOR 20 SECONDS ALLOWING SOME AIR TO ESCAPE FROM THE LEVELING SHOCKS. THE COMPRESSOR SHOULD NOW TURN ON AND RUN FOR APPROXIMATELY 5 SECONDS (AIR REPLENISHMENT CYCLE, ARC). WHEN THE COMPRESSOR SHUTS OFF, THE SYSTEM EXHAUST VALVE WILL TURN ON, ALLOWING AIR TO BE EXHAUSTED FROM THE REAR LEVELING SHOCKS. CHECK THE REAR LEVELING SHOCKS TO ENSURE THAT AIR IS BEING BLED OFF FROM THE RUBBER LEVELING SHOCK BLADDERS. A MAXIMUM OF 410 SECONDS (6.8 MINUTES) AFTER THE COMPRESSOR SHUTS OFF, THE EXHAUST VALVE WILL CLOSE. THE LEVELING SHOCK BLADDERS SHOULD HAVE MINIMUM AIR LEFT IN THEM AT THIS TIME. IF THE SHOCKS FAIL TO DEFLATE, REFER TO THE SUSPENSION SECTION OF THE SERVICE MANUAL (GMT/98-ST-PNP) FOR FURTHER DIAGNOSTIC PROCEDURES.
7. LOWER THE VEHICLE.
8. ACCESS THE ACCESSORY INFLATION CONTROL PANEL LOCATED IN THE RIGHT REAR INTERIOR TRIM PANEL. PRESS THE AUXILIARY INFLATION ON BUTTON AND VERIFY THAT AIR IS BEING SUPPLIED TO THE INFLATION VALVE LOCATED ABOVE THE ON/OFF BUTTONS (FIGURE 7). IF THE AIR IS NOT BEING SUPPLIED TO THE AUXILIARY VALVE, REFER TO THE SUSPENSION SECTION OF THE SERVICE MANUAL (GMT/98-ST-PNP) FOR FURTHER DIAGNOSTIC PROCEDURES.
9. PRESS THE AUXILIARY INFLATION OFF BUTTON AND VERIFY THAT THE AIR IS NO LONGER BEING SUPPLIED TO THE AUXILIARY AIR INFLATION VALVE LOCATED ABOVE THE ON/OFF BUTTONS (FIGURE 7). IF AIR CONTINUES TO BE SUPPLIED TO THE AUXILIARY VALVE, REFER TO THE SUSPENSION SECTION OF THE SERVICE MANUAL (GMT/98-ST-PNP) FOR FURTHER DIAGNOSTIC PROCEDURES.
10. TURN THE IGNITION KEY OFF. THE FUNCTIONAL CHECK IS COMPLETE.
11. RE-INSTALL THE TAIL GATE HEADER GARNISH MOLDING, DOOR SILL TRIM PLATE, AND THE RIGHT REAR BODY SIDE TRIM PANEL (FIGURES 1, 2, AND 3).
12. INSTALL THE GM CAMPAIGN IDENTIFICATION LABEL.
FIGURE 1 ROOF REAR HEADER GARNISH MOLDING
FIGURE 2 DOOR SILL TRIM PLATE
FIGURE 3 RIGHT REAR BODY SIDE TRIM PANEL
FIGURE 4 AUTOMATIC CONTROL RELAY
FIGURE 5 HEIGHT SENSOR LINK BALL STUD BRACKET
FIGURE 6 HEIGHT SENSOR ASSEMBLY
FIGURE 7 ACCESSORY INFLATOR CONTROL PANEL
FIGURE 8 HEIGHT SENSOR RUBBER ROUTING
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
INSTALL SENSOR KIT 1 --- * * MA-96 V0206 0.8
* FOR CAMPAIGN ADMINISTRATIVE ALLOWANCE, ADD 0.1 HOURS TO THE "LABOR HOURS".
** THE "PARTS ALLOWANCE" SHOULD BE THE SUM TOTAL OF THE CURRENT GMSPO DEALER NET PRICE PLUS 40% FOR THE SENSOR KIT NEEDED TO COMPLETE THE REPAIR.
REFER TO THE GENERAL MOTORS CORPORATION CLAIMS PROCESSING MANUAL FOR DETAILS ON PRODUCT CAMPAIGN CLAIM SUBMISSION.
FIGURES: 8
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
98035
(SAMPLE OF NOTIFICATION USED)
OCTOBER, 1998
DEAR GMC ENVOY CUSTOMER:
THIS NOTICE IS SENT TO INFORM YOU OF A RECALL CAMPAIGN THAT INCLUDES YOUR VEHICLE.
RECENTLY YOU MAY HAVE BEEN CONTACTED BY PONTIAC-GMC ABOUT MODIFICATIONS NEEDED TO THE LOAD LEVELING SUSPENSION ON YOUR ENVOY. AT THAT TIME YOU WERE OFFERED THE OPTION OF HAVING YOUR LOAD LEVELING FEATURE DISABLED UNTIL PARTS WERE AVAILABLE FOR THE FINAL CORRECTION. THIS LETTER IS TO INFORM YOU THAT PARTS ARE NOW AVAILABLE TO CORRECT YOUR LOAD LEVELING FEATURE.
REASON FOR THIS RECALL: GENERAL MOTORS HAS DECIDED THAT CERTAIN 1998 GMC ENVOYS MAY EXHIBIT A CONDITION WHERE THE LOAD LEVELING HEIGHT SENSING DEVICE MALFUNCTIONS RESULTING IN RAISING THE REAR OF THE VEHICLE ABOUT 6 INCHES, AND/OR THE COMPRESSOR WILL SWITCH ON AND RUN CONTINUOUSLY.
WHAT WILL BE DONE: TO PREVENT THE POSSIBILITY OF THIS CONDITION OCCURRING, YOUR GMC DEALER WILL INSTALL A NEW SENSOR KIT. THIS SERVICE WILL BE PERFORMED FOR YOU AT NO CHARGE.
CONTACTING YOUR DEALER: PLEASE CONTACT YOUR GMC DEALER AS SOON AS POSSIBLE TO ARRANGE A SERVICE DATE AND TO ASSURE PARTS AVAILABILITY. 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.
IF YOU EXPERIENCE ANY TROUBLE SCHEDULING YOUR VEHICLE OR YOU HAVE ANY QUESTIONS REGARDING THIS RECALL ACTION, PLEASE CONTACT THE GMC CUSTOMER ASSISTANCE CENTER AT 1-800-462-8782. THE DEAF, HEARING IMPAIRED, OR SPEECH IMPAIRED SHOULD CALL 1800- 462-8583 (UTILIZES TELECOMMUNICATION DEVICES FOR THE DEAF/TEXT TELEPHONES, TDD/TTY).
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 CONTINUED SATISFACTION WITH OUR PRODUCTS.
PONTIAC-GMC DIVISION GENERAL MOTORS CORPORATION ENCLOSURE COPYRIGHT 1998 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.
********************************************************************** CANADIAN VERSION ********************************************************************** PRODUCT CAMPAIGNS 98035(A) OCTOBER 1998
PRODUCT RECALL CAMPAIGN
CUSTOMER SATISFACTION CAMPAIGN
SUBJECT: CAMPAIGN 98035(A) LOAD LEVELLING SUSPENSION SYSTEM MALFUNCTION
MODELS: 1998 GMC ENVOY
THIS BULLETIN CANCELS AND REPLACES CAMPAIGN BULLETIN 98035 SENT JUNE 11, 1998 VIA DCS MESSAGE. THIS REVISED BULLETIN HAS THE FINAL CORRECTION. THE INTERIM PROCEDURE, WHICH WAS PUBLISHED IN THE JUNE DCS VERSION, IS NO LONGER TO BE PERFORMED ON VEHICLES. ALL COPIES OF DCS BULLETIN 98035 SHOULD BE DESTROYED.
DEFECT INVOLVED
GENERAL MOTORS OF CANADA LIMITED HAS DECIDED THAT CERTAIN 1998 GMC ENVOY MODEL VEHICLES MAY EXHIBIT A CONDITION WHERE THE LOAD LEVELLING HEIGHT SENSING DEVICE MALFUNCTIONS RESULTING IN RAISING THE REAR OF THE VEHICLE ABOUT 152MM (6 INCHES), AND/OR THE COMPRESSOR WILL SWITCH ON AND RUN CONTINUOUSLY.
TO PREVENT THE POSSIBILITY OF THIS CONDITION OCCURRING, DEALERS ARE TO INSTALL A NEW SENSOR KIT.
VEHICLES INVOLVED
INVOLVED ARE CERTAIN 1998 GMC ENVOY MODEL VEHICLES BUILT WITHIN THE FOLLOWING VIN BREAKPOINTS:
YEAR DIVISION MODEL PLANT CODE FROM THROUGH 1998 GMC ENVOY MORAINE "2" SOP W2954321
NOTE: PLEASE CHECK DCS SCREEN 445 OR YOUR V.I.N. LISTING BEFORE PERFORMING CAMPAIGN TO ENSURE THAT THE VEHICLE IS AFFECTED. ONLY AFFECTED VIN'S WILL BE PAID.
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
NOTICE: AN INITIAL SUPPLY OF SENSOR KITS REQUIRED TO COMPLETE THIS CAMPAIGN WILL BE PRE- SHIPPED TO INVOLVED DEALERS OF RECORD. THIS PRE-SHIPMENT WILL OCCUR THE WEEK OF OCTOBER 5, 1998. PRE-SHIPPED PARTS WILL BE CHARGED TO DEALER'S OPEN PARTS ACCOUNT.
ADDITIONAL PARTS, IF REQUIRED, 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 88880023 SENSOR KIT 1
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.
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 CUSTOMER LETTER ACCOMPANYING THIS BULLETIN.
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
RELAY REMOVAL
1. DISCONNECT THE BATTERY NEGATIVE CABLE.
2. REMOVE THE TAILGATE HEADER GARNISH MOULDING (FIGURE 1), DOOR SILL TRIM PLATE (FIGURE 2), AND THE RIGHT REAR BODY SIDE TRIM PANEL (FIGURE 3). REFER TO BODY SIDE TRIM PANEL REPLACEMENT IN INTERIOR TRIM SECTION 10A4 OF THE SERVICE MANUAL (GMT/98-ST-1).
3. DISCONNECT AND REMOVE THE ALC RELAY AND WIRE HARNESS AND DISCARD (FIGURE 4).
IMPORTANT: ACCESSORY INFLATOR CONTROL PANEL (FIGURE 7) ON/OFF SWITCH CAN BE REMOVED FROM THE TRIM PANEL, EASING THE WIRING HARNESS REPLACEMENT. THE ON/OFF SWITCHES MUST BE REMOVED FROM THE WIRING HARNESS AND REINSTALLED ON THE NEW WIRING HARNESS.
RELAY INSTALLATION PROCEDURE
1. INSTALL AND CONNECT THE ALC RELAY AND WIRING HARNESS (FIGURE 4) AND ON/OFF SWITCH (FIGURE 7) IN THE ACCESSORY INFLATOR CONTROL PANEL. REFER TO THE ALC SECTION 3 OF THE SERVICE MANUAL (GMT/98-ST-PNP).
2. DO NOT REINSTALL THE TAILGATE HEADER GARNISH MOULDING, DOOR SILL TRIM PLATE, AND THE RIGHT REAR BODY SIDE TRIM PANEL (FIGURES 1, 2, AND 3) UNTIL AFTER THE FUNCTIONAL CHECK IS COMPLETED.
HEIGHT SENSOR ASSEMBLY REMOVAL PROCEDURE
1. RAISE AND SUITABLY SUPPORT THE VEHICLE.
2. REMOVE THE ALC SENSOR LINK (FIGURE 5, ITEM 1) FROM THE REAR DIFFERENTIAL BRACKET BALL STUD.
3. REMOVE THE ALC SENSOR LINK BALL STUD BRACKET FROM THE REAR DIFFERENTIAL (FIGURE 5, ITEM 2), AND DISCARD THE BALL STUD BRACKET.
4. DISCONNECT THE ALC SENSOR ASSEMBLY ELECTRICAL CONNECTOR (FIGURE 6, ITEM 1) AT THE SPARE TIRE CROSS MEMBER. USING A 10MM SOCKET, REMOVE THE MOUNTING NUTS FROM THE ALC SENSOR ASSEMBLY FROM THE BRACKET (FIGURE 6, ITEM 2) AT THE SPARE TIRE CROSS MEMBER, AND DISCARD THE ALC SENSOR AND HARNESS ASSEMBLY. DO NOT REMOVE THE MOUNTING BRACKET FROM THE SPARE TIRE CROSS MEMBER.
HEIGHT SENSOR ASSEMBLY INSTALLATION
1. CONNECT THE ALC ELECTRICAL CONNECTOR (FIGURE 6, ITEM 1), BE SURE TO ENGAGE THE CONNECTOR AND CHRISTMAS TREE FASTENER INTO THE BRACKET ASSEMBLY. INSTALL THE MOUNTING NUTS (3) TO THE ALC SENSOR BOLTS TO THE CROSS MEMBER BRACKET AND TORQUE TO 3.5 N M (31 IN. LB.).
2. INSTALL THE ALC SENSOR BALL STUD BRACKET TO THE REAR AXLE (FIGURE 5, ITEM 2). TORQUE THE BALL STUD BRACKET BOLT TO THE REAR AXLE COVER TO 27 N M (20 FT. LB.).
3. DO NOT CONNECT THE LINK FROM THE ALC SENSOR ARM TO THE BALL STUD ON THE DIFFERENTIAL BRACKET; WHICH WAS ADDED IN STEP 2 ABOVE. AT THIS POINT, FREE MOVEMENT OF THE ALC SENSOR ARM WILL BE REQUIRED IN THE FUNCTIONAL SYSTEM TEST WHICH FOLLOWS.
4. MANUALLY ROTATE THE ALC SENSOR ARM UPWARD AS CLOSE TO THE VEHICLE FLOOR AS POSSIBLE. USE A LARGE RUBBER BAND (APPROX. 152MM-178MM [cent ]6-7 INCHES| LONG), INSTALL ONE END OVER THE SENSOR ARM (FIGURE 8, ITEM 1) AND WRAP IT AROUND OVER THE TOP OF THE SENSOR BRACKET (FIGURE 8, ITEM 2), AND DOWN AROUND OVER TOP OF THE ONE SCREW THAT IS NOT USED AS A MOUNTING POINT TO THE SENSOR BRACKET (FIGURE 8, ITEM 3). THE ALC SENSOR ARM SHOULD MAINTAIN ITS POSITION WHILE THE VEHICLE IS BEING LOWERED AND PREPARED FOR THE FUNCTIONAL CHECK OF THE ALC SYSTEM.
5. LOWER THE VEHICLE.
6. INSTALL THE 25 AMP FUSE FOR THE LD LEV IN THE FUSE BLOCK IN THE ENGINE COMPARTMENT, IF THE FUSE WAS PREVIOUSLY REMOVED IN THE INTERIM PROCEDURE.
FUNCTIONAL CHECK OF THE ALC SYSTEM
1. CONNECT THE NEGATIVE BATTERY CABLE.
2. TURN THE IGNITION KEY TO THE "RUN" POSITION.
3. RAISE AND SUPPORT THE VEHICLE IN A TRIM LEVEL POSITION. THE REAR SUSPENSION SHOULD BE UNSPRUNG, REAR WHEELS HANGING, AND THE VEHICLE SUPPORTED BY THE FRAME.
4. WITH THE ALC SENSOR ARM RUBBER BANDED IN THE UPWARD POSITION, THE SHOCKS SHOULD BE INFLATING OR INFLATED (APPROX. 60 SECONDS AFTER THE VEHICLE IS TURNED ON). IF THE SHOCKS FAIL TO INFLATE, REFER TO THE SUSPENSION SECTION OF THE SERVICE MANUAL (GMT/98-ST-PNP) FOR FURTHER DIAGNOSTIC PROCEDURES.
5. AFTER SUCCESSFUL SHOCK INFLATION, REMOVE THE RUBBER BAND HOLDING THE ARM UP, AND ATTACH THE LINK FROM THE ALC SENSOR ARM TO THE BALL STUD ON THE REAR AXLE DIFFERENTIAL BALL STUD BRACKET (FIGURE 1, ITEM 2).
NOTICE: WHEN RECONNECTING THE LINK, TAKE CARE NOT TO BEND OR BREAK THE ALC SENSOR ARM, AND MAKE SURE THE ALC SENSOR ARM AND LINK ARE PROPERLY ORIENTED. IMPROPER ORIENTATION WILL PREVENT THE ALC SYSTEM FROM OPERATING PROPERLY AND CAN RESULT IN DAMAGE TO THE ALC SENSOR (FIGURE 6, ITEM 3).
6. APPROXIMATELY 20 SECONDS AFTER THE ALC SENSOR ARM IS ROTATED DOWN FOR ATTACHMENT OF THE LINK TO THE DIFFERENTIAL BALL STUD BRACKET IN STEP 5, THE SYSTEM EXHAUST VALVE WILL TURN ON FOR 20 SECONDS, ALLOWING SOME AIR TO ESCAPE FROM THE LEVELLING SHOCKS. THE COMPRESSOR SHOULD NOW TURN ON AND RUN FOR APPROXIMATELY 5 SECONDS (AIR REPLENISHMENT CYCLE, ARC). WHEN THE COMPRESSOR SHUTS OFF, THE SYSTEM EXHAUST VALVE WILL TURN ON, ALLOWING AIR TO BE EXHAUSTED FROM THE REAR LEVELLING SHOCKS. CHECK THE REAR LEVELLING SHOCKS TO ENSURE THAT AIR IS BEING BLED OFF FROM THE RUBBER LEVELLING SHOCK BLADDERS. A MAXIMUM OF 410 SECONDS (6.8 MINUTES) AFTER THE COMPRESSOR SHUTS OFF, THE EXHAUST VALVE WILL CLOSE. THE LEVELLING SHOCK BLADDERS SHOULD HAVE MINIMUM AIR LEFT IN THEM AT THIS TIME. IF THE SHOCKS FAIL TO DEFLATE, REFER TO THE SUSPENSION SECTION OF THE SERVICE MANUAL (GMT/98-ST-PNP) FOR FURTHER DIAGNOSTIC PROCEDURES.
7. LOWER THE VEHICLE.
8. ACCESS THE ACCESSORY INFLATION CONTROL PANEL LOCATED IN THE RIGHT REAR INTERIOR TRIM PANEL. PRESS THE AUXILIARY INFLATION ON BUTTON AND VERIFY THAT AIR IS BEING SUPPLIED TO THE INFLATION VALVE LOCATED ABOVE THE ON/OFF BUTTONS (FIGURE 7). IF THE AIR IS NOT BEING SUPPLIED TO THE AUXILIARY VALVE, REFER TO THE SUSPENSION SECTION OF THE SERVICE MANUAL (GMT/98-ST-PNP) FOR FURTHER DIAGNOSTIC PROCEDURES.
9. PRESS THE AUXILIARY INFLATION OFF BUTTON AND VERIFY THAT THE AIR IS NO LONGER BEING SUPPLIED TO THE AUXILIARY AIR INFLATION VALVE LOCATED ABOVE THE ON/OFF BUTTONS (FIGURE 7). IF AIR CONTINUES TO BE SUPPLIED TO THE AUXILIARY VALVE, REFER TO THE SUSPENSION SECTION OF THE SERVICE MANUAL (GMT/98- ST-PNP) FOR FURTHER DIAGNOSTIC PROCEDURES.
10. TURN THE IGNITION KEY OFF. THE FUNCTIONAL CHECK IS COMPLETE.
11. REINSTALL THE TAILGATE HEADER GARNISH MOULDING, DOOR SILL TRIM PLATE, AND THE RIGHT REAR BODY SIDE TRIM PANEL (FIGURES 1, 2, AND 3).
12. INSTALL CAMPAIGN IDENTIFICATION LABEL.
FIGURE 1
ROOF REAR HEADER GARNISH MOULDING
FIGURE 2
DOOR SILL TRIM PLATE
FIGURE 3
RIGHT REAR BODY SIDE TRIM PANEL
FIGURE 4
AUTOMATIC CONTROL RELAY
FIGURE 5
HEIGHT SENSOR LINK BALL STUD
BRACKET
FIGURE 6
HEIGHT SENSOR ASSEMBLY
FIGURE 7
ACCESSORY INFLATOR CONTROL PANEL
FIGURE 8
HEIGHT SENSOR RUBBER ROUTING
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 INSTALL SENSOR KIT 1 --- ** MA-96 V0206 0.8
* FOR CAMPAIGN ADMINISTRATIVE ALLOWANCE, ADD 0.1 HOURS TO THE "LABOUR HOURS".
** THE "PARTS ALLOWANCE" SHOULD BE THE SUM TOTAL OF THE CURRENT GMSPO DEALER NET PRICE PLUS 40% FOR THE SENSOR KIT NEEDED TO COMPLETE THE REPAIR.
REFER TO THE GENERAL MOTORS CLAIMS PROCESSING MANUAL FOR DETAILS ON PRODUCT CAMPAIGN CLAIM SUBMISSION.
FIGURES:
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
COPYRIGHT 1998 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.
