CAMPAIGN: EGR BLLED RESTRICTOR OMITTED/POOR ENG. PERFORMANCE

General Motors has determined that some 1982 C10 and 1983 C10-20, K10 Series Light Duty Chevrolet Trucks equipped with 4.1 liter L6 engines and automatic transmissions may be emitting pollutants in excess of Federal Emission Standards.

The EGR bleed restrictor may have been omitted in the exhaust emission control harness assembly. The absence of this bleed restrictor may result in poor engine performance and failure to meet NOx emission standards.

VEHICLES INVOLVED

All 1982 C10 and 1983 C10-20, K10 Series Light Duty Chevrolet Trucks with RPO's LE3 (4.1L L6 engine) MD8 (automatic transmission) and NA5 or NA6 (Federal or High Altitude) emissions within the following vehicle parameters:

Plant Year Model From Through ----- ---- ----- ----- ------- Oshawa 1982 C10 C1214157 C1218821 1983 C10-20,K10 D1100051 D1100683

Janesville 1982 C10 CJ160197 CJ164900 1983 C10-20,K10 DJ100034 DJ110858 Flint 1982 C10 CF374929 CF392646 1983 C10-20,K10 DF300002 DF308476 St. Louis 1983 C10-20,K10 DS100009 DS108723

Involved vehicles have been identified by Vehicle Identification Number Computer Listings. Computer listings contain the complete Vehicle Identification 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 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. 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 in- cluded 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 or 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

1. Raise hood.

2. Remove air cleaner assembly.

3. Remove vacuum tee that contains hoses from the EGR valve, air cleaner and carburetor vacuum part (Refer to illustration).

4. Install new vacuum tee P/N 14057211 as shown in illustration.

5. Reinstall air cleaner and hoses to the EGR valve, air cleaner and carburetor vacuum.

6. Install campaign label.

7. Close hood.

PARTS INFORMATION

Part Number 14057211, bleed restrictor, required to complete this campaign is to be obtained by the dealer from the Chevrolet Zone Service Department. Parts will be furnished to the dealer on a no charge basis.

Part Number Quantity Description ----------- -------- ----------- 14057211 1 EGR Bleed Restrictor

Parts are not to be ordered from or returned to the Warehousing Distribution Division of General Motors (WDDGM).

CLAIM INFORMATION

Submit a Product Claim with the information indicated below:

Parts Failed **Parts Failure Labor Labor *Other Count Part No. Allowance Code Operation Hours Hours ----- -------- ----------- ---- ---------- ----- ----- 1 14057211 .22 00 V1870 .2 .1

Description: Install EGR bleed restrictor in accordance with the instructions outlined in this bulletin.

*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 parts and 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.

General Motors has determined that some 1982 C10 and 1983 C10-20, K10 Series Light Duty Chevrolet Trucks equipped with 4.1 liter L6 engines and automatic transmissions may be emitting pollutants in excess of Federal Emission standards.

The exhaust gas recirculating (EGR) bleed restrictor may have been omitted in the exhaust emission control harness assembly. The absence of this bleed restrictor may result in poor engine performance and failure to meet NOx emission standards.

To bring your vehicle into compliance with applicable emission requirements, Chevrolet Dealers will install the EGR bleed restrictor. This service will be performed at no charge to you. Please contact your Chevrolet Dealer on or after the date shown below to arrange an appointment to have this condition corrected.

Instructions for making this correction have been sent to your dealer. It is estimated that parts will be available at your dealer on or about November 22, 1983. The labor time for making this modification is approximately 20 minutes.

The enclosed 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 let us know by completing the postage paid owner 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.

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.