CAMPAIGN: ELECT. LEVEL CONTROL LINKAGE AND SENSOR REPLACEMENT
SUBJECT: ELECTRONIC LEVEL CONTROL LINKAGE
MODELS: 1992 GMC TYPHOON
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 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 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 appointments with owners and to repair their vehicles 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 GMC Zone Office if the 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, they are instructed how to contact the National Highway Traffic Safety Administration.
DEFECT INVOLVED
PAS Inc., the final stage manufacturer of the 1992 GMC Typhoon, has determined that a defect which relates to motor vehicle safety exists in certain early built 1992 GMC Typhoons. The Electronic Level Control (ELC) sensor link may become disconnected from the ELC sensor assembly arm and the sensor arm could then become captured between the rear axle assembly and the right rear brake line near the junction block. In this position, normal suspension movement can cause the arm to wear through the rear brake line resulting in a loss of rear braking. If this occurs, the front braking would remain functional; however, a reduction of braking ability at a time when a minimum stopping distance is required could result in a vehicle crash without prior warning.
To correct this condition, it will be necessary to install a revised ELC system. Additionally, the brake pipe and ABS wire will be inspected for signs of damage and replaced if necessary.
VEHICLES INVOLVED
Involved are certain 1992 GMC Typhoons built within the following VIN breakpoints:
Model Year From TO 1992 N081 0001 NO810754
Notice: Vehicles built after 12-1-91 possess an "ELC - OKAY" sticker on the top surface of the radiator support on the drivers side of vehicle.
The specific vehicles involved in this campaign have been identified by Vehicle Identification Number (VIN) Computer Listings. These listings are furnished to all involved dealers with the campaign 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. Dealers are to inspect and correct all affected vehicles in new and used vehicle stock prior to their sale.
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 ensure 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 cor- rection according to instructions contained in this bulletin.
If the name and address of the owner of an involved vehicle was unavailable to GMC Truck Division at the time of campaign initiation, the dealer must determine the owner's name and address from the dealership sales records. Please provide this information directly on the second copy of the listing next to the applicable VIN so that our records may be updated and the appropriate notification mailed to the owner. This second copy should then be submitted to the address listed below in the previously supplied yellow campaign envelopes.
GMC Truck Division General Motors Corporation 101 Union Street Plymouth, Michigan 48170
OWNER NOTIFICATION
Owners will be notified of this campaign on their vehicles by GMC Truck Division (see copy of owner letter included with this bulletin). A listing of owner names and addresses has been furnished to the involved dealers to enable dealers to follow up with owners involved in this campaign. This listing 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 this campaign.
SERVICE PROCEDURE
1. Raise vehicle on hoist.
2. Inspect brake line assembly in area of ELC (electronic level control) system for signs of abrasion or gouging. If any is noted, brake lines should be replaced following the procedures in service manual X-9229, Section 5A.
3. Inspect the wiring harness to both rear wheel speed sensors for signs of damage. If any is noted, replace the affected rear wheel speed sensor assembly according to procedures in service manual X-9229, Section 5El.
4. Remove entire ELC sensor control system assembly (Figure 1).
5. Arrange ABS wheel speed sensor wires as shown in Figure 2. Tie wrap as shown in View A, Figure 2.
6. Install new level sensor assembly using the existing bracket mounting bolts. Be sure to check that the wiring harnesses in the area around the level sensor assembly are not pinched. Refer to Figure 2 for proper wiring harness placement. Torque mounting bolts to 14-20 N.m. (10-15 lbs. ft.) (Figure 1).
7. Remove the old axle bracket and loosely install the new axle bracket using existing mounting bolt (Figure 3).
8. Be sure that there is at least 12.7 mm (0.5 in.) between the new axle bracket assembly and the brake junction block mounting bracket. Also, there is to be 6.35 mm (0.25 in.) clearance between the axle bracket and the right rear brake pipe assembly. Torque bolt to 18-24 N.m. (13-18 lbs. ft.) (Figures 4A and 4B).
9. Connect ELC lower sensor link to axle bracket and close snap lock (Figure 5).
10. Install lower link retainer to axle bracket assembly and torque bolt to 15-20 N.m. (11-15 lbs. ft.) (Figure 5).
11. Cable tie right rear wheel sensor harness to brake pipe between bracket mounting bolt and next clockwise bolt on axle cover as shown in Figure 5.
12. Perform ELC preliminary check as found on page 9 of the Electrical Diagrams and Diagnosis Manual in the rear of the 1992 Syclone, Typhoon and Sonoma GT Service Manual Supplement, X-9276.
13. Install "Campaign Identification Label."
PARTS INFORMATION
Each of the affected dealers has been shipped a parts kit by PAS, Inc. On the shipping label, PAS will supply the VIN of the vehicle that the kit is designated for. If there are any discrepancies, parts are to be obtained from General Motors Service Parts Operation (GMSPO) after December 20, 1991.
Part Number Description Quantity -------- ---------------------- -------- 15665572 Sensor Assembly, ELC 1 15665573 Axle Bracket Asm 1 15665574 Retainer, ELC Sensor Link 1 Lower 15665575 Retainer, ELC Sensor Link Upper 15665576 Stop, ELC Sensor Arm 1 15664595 Bracket, ELC Sensor 1 01615323 Link Asm 1 11509088 Strap, Cable Tie 2 11503734 Nut, ELC Sensor Link 1 Upper Retainer 115137421 Bolt/Screw, ELC Sensor 1 Link Lower Retainer
WARRANTY INFORMATION
Dealers should submit a warranty claim on each vehicle completed under this campaign.
Labor Operation *Time *Parts Trouble Number Description Allowance Allowance Code --------- ----------- --------- --------- ------ V7230 ELC Level 0.4 hr. $48.21 96 Sensor Revision Add: 0.6 hrs. for replacement of each Brake Pipe 0.8 hrs. for replacement of the ABS Wheel Speed Sensor Wire
*For dealer to receive Administrative Time Allowance associated with this campaign, add 0.1 hour to the Labor Operation Time Allowance.
**The amount identified in the "Parts allowance" column above represents 30% of dealer net for parts that are furnished in this campaign. This amount is to be placed in the Net Item Amount column of the claim and 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 campaign number and five (5) digit dealer code of the dealer performing the campaign service. This information may be inserted with a typewriter or 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" #P9119.
Dear GMC Truck Owner:
This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act.
PAS Inc., the final stage manufacturer of the 1992 GMC Typhoon, has determined that a defect which relates to motor vehicle safety exists in certain early built 1992 GMC Typhoons. The Electronic Level Control (ELC) sensor link may become disconnected from the ELC sensor assembly arm and the sensor arm could then become captured between the rear axle assembly and the right rear brake line near the junction block. In this position, normal suspension movement can cause the arm to wear through the rear brake line resuiting in a loss of rear braking. If this occurs, the front braking would remain functional; however, a reduction of braking ability at a time when a minimum stopping distance is required could result in a vehicle crash without prior warning.
To correct this condition, it will be necessary to install a revised ELC system. Additionally, the brake pipe and ABS wire will be inspected for signs of damage and replaced if necessary. This service will be performed for you at no charge.
Instructions for performing this service have been sent to your GMC Truck dealer. Please contact your dealer to arrange a service date. The labor time necessary to perform this correction will vary from 15 to 30 minutes. Please ask your dealer how much additional time will be needed to process your vehicle. Your GMC Truck dealer is best equipped to provide service to ensure your vehicle is corrected as promptly as possible. However, if you take your vehicle to your dealer on the agreed service date and they do not service this condition on that date or within five days, we recommend you contact your nearest GMC Truck Zone Office by telephone. The Zone Office will assist you and your dealer in getting your vehicle corrected. The telephone numbers of the Zone Offices are listed in your Warranty and Owner Assistance Information Manual.
After contacting your dealer and the Zone Office, if you are still not satisfied that we have done our best to remedy this condition without charge within a reasonable time, you may wish to write the Administrator, National Highway Traffic Safety Administration, 400 Seventh Street, S.W., Washington, D.C. 20590, or call 800-424-9393 (Washington, D.C. residents use 366-0123).
The enclosed postage paid owner reply card identifies your vehicle. Presentation of this card to your dealer will assist in making the necessary correction to your vehicle in the shortest possible time. If you have sold or traded your vehicle, please furnish us complete name and address of the person you sold or traded your vehicle to and return the card 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 product.
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.
