CAMPAIGN: EGR/EPR SOLENOID ASSEMBLY REPLACE - DIESEL

Model and Year: 1984 C/K/G 10-20 MODEL TRUCKS EQUIPPED WITH 6.2L LIGHT DUTY EMISSION DIESEL ENGINE (RPO LH6) AND CALIFORNIA EMISSIONS (RPO YF5)

TO: ALL CHEVROLET DEALERS

Ceneral Motors has determined that some 1984 C/K/G 10-20 Model Trucks equipped with a 6.2L Light Duty Emission Diesel Engine (RPO LH6) and California Emissions (RPO YF5) may emit pollutants in excess of Federal Emissions Standards.

The adhesive used to assemble the rubber vacuum manifold halves of the EGR/EPR Solenoid Assembly may deteriorate and result in vacuum leaks. Vacuum leakage renders the ECR/EPR solenoids inoperative, which may result in failure to meet NOx emission standards.

VEHICLES INVOLVED

Involved are certain 1984 C/K/G 10-20 Model Trucks equipped with a 6.2L Light Duty Emission Diesel Engine (RPO LH6) and California Emissions (RPO YF5), built within the following breakpoints:

PLANT FROM THROUGH ----- ---- ------- Flint EF100009 EF176598 Janesville EJ146780 EJ172426 Scarborough E4144800 E4163157

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.

SERVICE PROCEDURE

Remove original EGR/EPR solenoid assembly and replace with P/N 1997134 (see Figure 1). Reference the 1984 Chevrolet Light Duty Truck Shop Manual ST-330-84, Page 6E9-19, Figure 6E9-34.

PARTS INFORMATION

Parts required to complete this modification are to be obtained from General Motors Warehousing and Distribution Division (GMWDD). To ensure that these parts will be obtained as soon as possible they should be ordered from GMWDD on a C.I.O. order with no special instruction code, but on an advise code (2).

QUANTITY PART PER NUMBER DESCRIPTION VEHICLE ------ ----------- -------- 1997134 EGR/EPR Solenoid 1 Assembly

CLAIM INFORMATION

Submit a Product Campaign Claim with the information indicated below:

Parts Failed **Parts Failure Labor Labor *Other Count Part No. Allowance Code Operation Hours Hours

1 1997134 00 V2920 . 3 .1

DESCRIPTION: Replace EGR/EPR Solenoid Assembly, "C/K" Models only.

Parts Failed **Parts Failure Labor Labor *Other Count Part No. Allowance Code Operation Hours Hours

1 1997134 00 V2921 . 5 .1

DESCRIPTION: Replace EGR/EPR Solenoid Assembly, "G" Models only.

*Campaign Administrative Allowance.

**The "Parts Allowance Column represents 30% of dealer net when parts are furnished no charge by Chevrolet.

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

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

CAMPAIGN IDENTIFICATION LABEL

Each vehicle modified 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 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.

ADMINISTRATIVE PROCEDURE

REFER TO THE CURRENT CHEVROLET SERVICE POLICIES AND PROCEDURES MANUAL AND CLAIMS PROCESSING MANUAL FOR CAMPAIGN HANDLING AND ADMINISTRATIVE PROCEDURES.

Dear Chevrolet Owner:

General motors has determined that some 1984 C/K/G 10-20 Model Trucks equipped with a 6.2L Diesel Engine and California Emissions may emit pollutants in excess of emissions standards.

The adhesive used to assemble the rubber vacuum manifold halves of the EGR/EPR Solenoid Assembly may deteriorate and result in vacuum leaks. Vacuum leakage can render the EGR/EPR solenoids inoperative, which may result in failure to meet NOx emission standards.

To bring your vehicle into compliance with applicable emissions require- ments, please contact your Chevrolet dealer to arrange a service date. Your dealer will install a new EGR/EPR solenoid assembly for you at no charge.

Instructions for making this correction have been sent to your Chevrolet Dealer. Parts will be available on October 7, 1985. The labor time required to install the new EGR/EPR solenoid varies between 15 and 30 minutes. Please ask your dealer if you wish to know how much additional time will be needed to process your vehicle.

The enclosed owner reply card identifies your vehicle. Presentation of this card to your dealer will assist him 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. 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 of the Zone Offices have been attached for your convenience.

To ensure your full protection under the emission warranty made applicable to your vehicle by Federal Law, and your right to participate in future recalls, it is recommended that you have your vehicle serviced as soon as possible. Failure to do so could legally be determined to be a lack of proper maintenance of your vehicle.

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 Walden Avenue 3440 Hollywood Blvd. Cheektowaga, NY 14225 Suite 420 (716) 891-7182 Hollywood, FL 33021 (305) 961 -7752 CHARLESTON Chevrolet Customer Assistance KANSAS CITY 30007 Van Dyke 10800 Farley Warren, MI 48090 Suite 100 1-800-222-1020 Overland Park, KS 66210 (913)451-4380 CHARLOTTE Chevrolet Customer Assistance LOS ANGELES 30007 Van Dyke 233 Wilshire Blvd. Warren, MI 48090 Suite 800 1-800-222-1020 Santa Monica, CA 90401 (213)393-9356 CHICAGO 475 Alexis R. Shuman Blvd. LOUISVILLE Naperville, IL 60566 4501 Indian Trail (312)961-6380 Louisville, KY 40213 (502)968-6203 CINCINNATI 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, Wl 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

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

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

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)895-8608/8609

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, Michigan 48090 (313)492-5500

CANADA Customer Services Departmen General Motors of Canada Limited Oshawa, Ontario L1J 5Z6 (416)644-6624

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.