CAMPAIGN: VEHICLE ANTI-THEFT SYSTEM INOPERATIVE OR NO-START. Chevrolet Corvette 1986

MODELS: 1986 Chevrolet Corvette Models

TO: ALL AFFECTED DEALERS:

DEFECT INVOLVED:

General Motors of Canada has determined that some early 1986 Chevrolet Corvette models may experience a no-start, loss of fuel delivery on start up and loss of anti theft protection. This condition may be the result of a malfunction in the vehicle anti theft module.

To prevent this condition from occurring, a new module will be installed, in addition, new keys will likewise be furnished with each new module.

VEHICLES INVOLVED:

Involved are certain early 1986 Chevrolet Corvette Models equipped with the "Vehicle Anti Theft System (VATS)" within the following parameters:

Plant From Through ----- ---- ------- Bowling Green G5100001 G5103700

All affected vehicles have been identified by the VIN listing provided to involved Dealers with this bulletin. Any Dealer not receiving a listing was not shipped any of the affected vehicles.

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.

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.

Owners of vehicles recently sold from your new vehicle inventory are to be contacted by the Dealer, and arrangements made to make the required modification according to instructions contained in this bulletin.

CAMPAIGN PROCEDURE:

Refer to Section 4 of the Service Policies and Procedures Manual for the detailed procedure on handling Product Campaigns. Dealers are requested to complete the campaign on all transfers as soon as possible.

OWNER NOTIFICATION:

All owners 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. The listings provided are for campaign activity only and should not be used for any other purpose.

PARTS INFORMATION:

One module for each vehicle will be shipped and charged to Dealers that have affected vehicles.

Part Quantity Number Per Vehicle Description ------ ----------- ------------ 1227760 1 Vehicle Anti Theft Module

* BEFORE MAKING AN APPOINTMENT WITH AN OWNER FOR THIS CAMPAIGN MODIFICATION, THE FOLLOWING ACTIONS SHOULD BE TAKEN:

1. Upon receipt of the module determine the key code required as shown on the label attached to the module.

2. Order 3 key blanks using the P/N corresponding to the indicated code. A complete list of key codes and P/N's follows:

14093152 Code # 1 14093157 Code # 6 14093162 Code #11 14093153 Code # 2 14093158 Code # 7 14093163 Code #12 14093154 Code # 3 14093159 Code # 8 14093164 Code #13 14093155 Code # 4 14093160 Code # 9 14093165 Code #14 14093156 Code # 5 14093161 Code #10 14093166 Code #15

PARTS AND LABOUR CLAIM INFORMATION:

Credit for the campaign work performed will be paid upon receipt of a properly completed campaign claim card or RAPID terminal transmission in accordance with the following:

Repair Code Operation Time Allowance ----------- --------- -------------- 1A Inspection for Prior .3 Replacement of Module

2A Inspect and Replace 1.0 module and Cut Keys

Time allowance includes 0.3 hour for Dealer administrative detail associated with this campaign. Parts credit will be based on dealer net plus 30% to cover parts handling.

SERVICE PROCEDURE

THIS PROCEDURE INVOLVES WORKING NEAR THE ELECTRONIC CLUSTER ADEQUATE PRECAUTION SHOULD BE TAKEN TO AVOID ANY ELECTROSTATIC DISCHARGE, (EDS) WHICH MAY DAMAGE THE CLUSTER.

1. REMOVE THE I/P CLUSTER TRIM PLATE

Pull off headlamp switch knob.

Move the steering wheel to it's lowest position and telescope it all the way out.

Remove the tilt lever from the column.

Unscrew the eight (8) screws holding the trim plate and remove it.

2. REMOVE THE I/P ACCESSORY TRIM PLATE

Four (4) screws hold it on.

3. REMOVE THE I/P UPPER TRIM PAD. (Care must be taken when handling this pad to avoid damage to it).

Remove three (3) screws above the cluster.

Remove the two (2) screws above the centre display.

Remove the fuse box cover and the right hand I/P trim plate.

Remove the I/P pad screw located above the fuse box.

Remove the two (2) screws from the defroster duct.

Pull the I/P pad rearward and up to remove it. (If the car has speakers mounted on the pad the wires must be removed first).

WHEN REASSEMBLING THE I/P PAD BE SURE TO LINE UP ALL OF THE HOLES AND NUTS. FAILURE TO DO THIS COULD CAUSE A NOISE CONDITION TO EXIST.

DO NOT OVERTORQUE THE SCREWS AT THE DEFROSTER DUCT WHEN REINSTALLING.

4. REMOVE THE TOP TWO SCREWS FROM THE I/P CENTRE TRIM PAD ASSEMBLY AND TILT IT FORWARD.

5. REMOVE THE VATS MODULE. (2 SCREWS)

6. INSTALL THE NEW VATS MODULE AND REVERSE THE ABOVE PROCEDURE TO REASSEMBLE THE VEHICLE.

7. REMOVE LABEL FROM MODULE INDICATING KEY CODE.

8. CUT THE THREE KEYS SUPPLIED TO MATCH THE IGNITION KEY ORIGINALLY SUPPLIED WITH THE VEHICLE.

9. RAISE HOOD. INSTALL CAMPAIGN COMPLETION LABEL. CLOSE HOOD.

10. START THE VEHICLE TO INSURE THAT THE SYSTEM IS WORKINC PROPERLY.

11. DISCARD ORIGINAL KEY(S) TO AVOID FUTURE MIX-UP.

INSTALLATION OF CAMPAIGN IDENTIFICATION LABEL

Clean Surface of radiator upper mounting panel and apply a Campaign Identification Label. Make sure the correct campaign number is inserted on the label. This will indicate that the campaign has been completed.

Dear General Motors Customer:

To prevent this condition from occurring on your vehicle a new module will be installed, in addition, new keys will likewise be furnished. This service will be perfomed for you at no charge.

Instructions for this service have been sent to your Chevrolet Dealer. Please contact your Dealer to arrange a service date. The labour time to make this modification on your vehicle is approximately 1 hour. Please ask your Dealer if you wish to know how much additional time will be needed to process your vehicle.

This letter identifies your vehicle. Presentation of this letter to your Dealer will assist their Service personnel in completing the necessary correction to your vehicle in the shortest possible time.

Further assistance, if required, may be obtained from the General Motors Zone office nearest you. Your vehicle Owner's Manual provides the location and phone number of each respective Zone Office.

We are sorry to cause you this inconvenience; however, we have taken the action in the interest of your continued saatissfaction with our products. Your prompt cooperation would be appreciated.

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.