CAMPAIGN: TORQUE CONVERTER CLUTCH HARNESS MISSING. Chevrolet Blazer

Model and Year: 1985 CHEVROLET "S/T" LIGHT DUTY TRUCKS EQUIPPED WITH A 2.8L V6 (B) ENGINE, 70OR4 AUTOMATIC TRANSMISSION (MXO) AND CALIFORNIA EMISSIONS (NB2) - SHREVEPORT ONLY

TO: ALL CHEVROLET DEALERS

General Motors has determined that certain 1985 Chevrolet "S/T" Light Duty Trucks equipped with a 2.8L V6 (B) engine code, automatic transmission and California emissions system were built without a "Torque Converter Clutch (TCC)" wiring harness.

The omission of a "Torque Converter Clutch (TCC)" wiring harness will not allow the torque converter clutch to engage. This can cause excessive heat build up which may result in premature transmission failure.

VEHICLES INVOLVED

Certain 1985 Chevrolet "S/T" Light Duty Trucks equipped with a 2.8L V6 (B) engine, 70OR4 automatic transmission (MXO) California emissions (NB2) within the following parameters:

Plant From Through ----- ---- -------- Shreveport F8105036 F8111423

Involved vehicles have been identified by Vehicle Identification Number Computer Listings. Computer listings contain the complete Vehicle Iden- tification Number, owner name and address data, and are furnished to the involved dealers with the campaign bulletin. Owner name and address data furnished will enable dealers to follow-up with owners involved in this campaign.

These listings may contain owner names and addresses obtained from State Motor Vehicle Registration Records. The use of such motor vehicle regis- tration 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. Any dealer not receiving a computer listing with the campaign bulletin was not shipped any involved vehicles.

OWNER NOTIFICATION

Owners will be notified of this campaign on their vehicles by Chevrolet Motor Division (see copy of Owner Letter included with this 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.

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.

PARTS INFORMATION

Parts required to complete this modification are to be obtained from your Chevrolet Zone Service Department.

INSPECTION PROCEDURE

If vehicle is equipped with cruise control (RPO K34), inspect to determine if transmission torque converter wire, P/N 12038160, has been previously installed and connected to cruise control vacuum release valve, P/N 22509432, as shown in Figure 1. If wire and valve have been correctly installed, no correction is required.

If vehicle is not equipped with cruise control, inspect to determine if the transmission torque converter clutch wire, P/N 12038160, has been previously installed and connected to stop lamp switch, P/N 25504628, as shown in Figure 2. If wire and switch have been correctly installed, no correction is required.

SERVICE PROCEDURE

If inspection reveals vehicle requires wiring harness and switch, follow the procedure identified below:

1. With ignition key in "off" position, open hood and disconnect negative battery cable.

2. Remove center trim panel, located under the steering column. If vehicle is equipped with custom trim package, it will be necessary to first remove the noise insulator panel located below the center trim panel.

Vehicle Equipped With Cruise Control (RPO K34)

1. Disconnect vacuum hose from cruise control vacuum release valve (located adjacent to stop lamp switch). Remove vacuum release valve and discard.

2. Install black colored male connector plug of new wire assembly P/N 12038160, into I/P harness connector (see Figure 1).

3. Install clear colored connector plug or new wire assembly into fuse panel cavity marked "IGN."

4. Secure new wire assembly to I/P harness, as shown in Figure 1, with two new tie straps (P/N 11501906).

5. Connect remaining clear colored plug of new wire assembly and cruise control vacuum hose to new cruise control vacuum release valve, P/N 25509432, (see Figure 1). Install valve into stop lamp switch mounting bracket and adjust (reference Figure 3 for instruction).

6. Install new U-Nut on center trim panel. Reinstall center trim panel.

7. Route remaining portion of new wire assembly under stop lamp switch and cruise control vacuum release valve. If vehicle is equipped with noise insulator panel, route new wire assembly "ALDL" connector lead through cut out and install noise insulator panel.

8. Position new wire assembly "ALDL" connector so that connector socket points towards the passenger side of vehicle and connector bracket hole aligns with center trim panel, new U-Nut and noise insulator panel if equipped. While holding connector, install new screw through connector bracket and noise insulator panel if equipped into new U-Nut and tighten.

9. Reinstall negative battery cable, install campaign completion label and close hood.

Vehicles Not Equipped With Cruise Control

1. Disconnect I/P harness plug from stop lamp switch. Discard stop lamp switch.

2. Install black colored male connector plug of new wire assembly, P/N 12038160, into I/P harness connector (see Figure 2).

3. Install clear colored male connector plug of new wire assembly into fuse panel cavity marked "IGN."

4. Secure new wire assembly to I/P harness, as shown in Figure 2, with two new tie straps.

5. Connect I/P harness plug that was disconnected and clear female connector plug of new harness to new stop lamp switch, P/N 25504528 (see Figure 2).

Install and adjust new stop lamp switch (reference 1985 Light Duty Truck Service Manual, Page 8B-17, for instructions).

Follow steps 6 thru 9 to complete Service Procedure.

CAMPAIGN IDENTIFICATION LABEL

Each vehicle modified in accordance with the instructions outlined in this Product Campaign Bulletin will require a "Campaigan Identification Label." Each label provides a space to include the five digit dealer code of the dealer performing the campaign service. This information may be inserted with a typewriter or ballpoint 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.

CLAIM INFORMATION

Submit a Product Campaign Claim with the information indicated below:

* ** Failed Parts Lab Oth Net Repair Performed PC Part No. Allow FC Labop Hrs Hrs Amt ----------------- -- -------- ----- -- ----- --- --- ---

Inspect for TCC Wiring harness and swich 00 V3000 .2 .1

Inspect & Install Missing TCC Wiring harness & Assoc Parts Without RPO K34 Cruise Ctl 00 V3001 .4 .1 4.05

Inspect & Install Missing TCC Wiring Harness & Assoc Parts With RPO K34 Cruise Ctl 00 V3002 .4 .1 5.96

TCC= Torque Converter Clutch

*Campaign Administrative Allowance

** Dealers will automatically be credited 30% of dealer net when parts are furnished at no charge by Chevrolet.

Dealers will automatically receive the correct labor allowance based on labor operation performed.

Refer to the Chevrolet Claims Processing Manual for details on Product Campaign Claim submission.

Dear Chevrolet Owner:

To correct this condition, when required, please contact your Chevrolet dealer to arrange a service date to install the missing Torque Converter Clutch wiring harness and associated parts on your vehicle. This service will be performed at no charge to you.

Instructions for making the correction(s) have been sent to your dealer. The labor time to perform this service is approximately 20 minutes. Please allow additional time for your dealer to process your vehicle.

The enclosed Owner Reply Card identifies your vehicle. Presentation of this card to your dealer will assist in making the inspection to your vehicle in the shortest possible time. If you have sold or traded your vehicle, please let us know by completing the postage paid Owner Identification Reply Card and returning it to us so that we may update our records. Should your dealer not schedule a service date within a reasonable time, you should contact your nearest Chevrolet Zone Office either in person or by telephone for assistance. The locations and telephone numbers for zone offices are attached for your convenience.

We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your continued satisfaction with our product.

CHEVROLET ZONE OFFICES

WHEN CALLING FOR ASSISTANCE, PLEASE ASK FOR THE CONSUMER RELATIONS REPRESENTATIVE

ATLANTA HOUSTON Chevrolet Customer Assistance 13101 N.W. Freeway 30007 Van Dyke Suite 101 Warren, MI 48090 Houston, TX 77040 1-800-222-1020 (713) 460-7301 BIRMINGHAM INDIANAPOLIS 3490 Independence Hwy. 6910 N. Shadeland Ave. Homewood AL 35259 Indianapolis, IN 46220 (205)287-5306 (317) 269-5031 BOSTON JACKSONVILLE Chevrolet Customer Assistance 6622 Southpoint Dr. S. 30007 Van Dyke Suite 200 Warren, Mi 48090 Jacksonville, FL 32207 1-800-222-1020 (904) 739-7711 BUFFALO Miami Branch Office 2615 Waiden Avenue 3440 Hollywood Blvd. Cheektowaga, Ny 14225 Suite 420 (716) 891-7182 Hollywood, FL 33021 CHARLESTON (305) 961-7752 Chevrolet Customer Assistance KANSAS CITY 30007 Van Dyke 10800 Farley Warren, MI 48090 Suite 100 1-800-222-1020 Overland Park, KS 66210 CHARLOTTE (913) 451-4380 Chevrolet Customer Assistance LOS ANGELES 30007 Van Dyke 233 Wilshire Blvd. Warren,MI 48090 Suite 800 1-800-222-1020 Santa Monica, CA 90401 CHICAGO (213) 393-9356 475 Alexis R. Shuman Blvd. LOUISVILLE Naperville, IL 60566 4501 Indian Trail (312)961-6380 Louisville, KY 40213 CINCINNATI (502) 968-6203 Chevrolet Customer Assistance MEMPHIS 30007 Van Dyke 866 Ridgeway Loop Ave. Warren, MI 48090 Memphis, TN 38117 1-800-222-1020 (901) 756-3360 CLEVELAND MILWAUKEE 25000 Great Northern Corporate Center 333 Bishops Way Suite 444 Brookfield, Wi 53005 North Almsted, OH 44070 (414) 784-2578 (216)265-5600 MINNEAPOLIS DALLAS 7600 Metro Blvd. 130 E. Carpenter Freeway Edina, MN 55435 Irving,TX 75062 (612) 830-4044 (214)659-5441 NEW ORLEANS DENVER 3545 1-10 Service Road 4355 Keamey St. Metairie, LA 70002 Denver, CO 80216 (504) 888-9013 (303)398-7023 NORTH JERSEY DETROIT 9 Sylvan Way 3031 W. Grand Blvd. Parsippany, NJ 07054 Detroit, Mi 48202 (201) 993-4155 (313)556-5903 OAKLAND* FARGO 39465 Paseo Padre Parkway 1111 38th St. So. Fremont, CA 94538 Fargo, ND 58103 (415) 498-5080 (701)282-4451 OKLAHOMA CITY FLINT 6307 Waterford Blvd. Chevrolet Customer Assistance Suite 200 30007 Van Dyke Oklahoma City, OK 73118 Warren,MI 48090 (405) 841-5000 1-800-222-1020

OMAHA 10836 Old Mill Rd. Omaha, NE 68154 (402) 399-5515 PEORIA 3425 N. Dries Lane Peoria, IL 61604 (309)688-1021 PHILADELPHIA 851 Duportail Rd. Wayne, PA 19087 (215)296-6600 PHOENIX 1625 W. 23rd St. Tempe, AZ 85282 (602)829-6201 PITTSBURGH 2 Penn Center W. Suite 200 Pittsburgh, PA 15276 (412)928-5125 PORTLAND* 10300 S.W. Greenburg Road, Suite 500 Portland, OR 97223 (503) 293-5000 RICHMOND Chevrolet Customer Assistance 30007 Van Dyke Warren, MI 48090 1-800-222-1020 SALT LAKE CITY 303 East South Temple Salt Lake City, UT 84111 (801)534-7125 ST. LOUIS 83 Progress Parkway Maryland Heights, MO 63043 (314)469-8608 SYRACUSE Chevrolet Customer Assistance 30007 Van Dyke Warren, MI 48090 1-800-222-1020 TARRYTOWN 2500 Westchester Ave. Purchase, NY 10577 (914)251-5121 WASHINGTON 1395 Piccard Drive Rockville, MD 20850 (301) 258-1444 CENTRAL OFFICES UNITED STATES Chevrolet Motor Division Consumer Relations Dept. Chevrolet Central Office Warren, Michigan48090 (313)492-5500 CANADA Customer Services Department General Motors of Canada Limited Oshawa, Ontario LlJ 5Z6 (416)644-6624

NOTE: The state of ALASKA is serviced by the Portland Zone.

The state of HAWAII is serviced by the Oakland Zone. Hawaii, call 1-800-428-8244.

Object Number: 75744 Size: FS

Object Number: 75660 Size: FS

Object Number: 75973 Size: FS

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.