CAMPAIGN: PRODUCT EMISSION CO-EXHAUST EMISSIONS. Geo Spectrum 1986

SUBJECT: PRODUCT EMISSION CAMPAIGN 86C29 - CO EXHAUST EMISSIONS

MODEL and YEAR: 1986 CHEVROLET SPECTRUM WITH 1.5L ENGINE

To: All Chevrolet Dealers

General Motors and the Environmental Protection Agency have determined that certain 1986 Chevrolet Spectrum model vehicles with 1.5L engines may exceed carbon monoxide (CO) Federal Emission Standards. Vehicles are affected as follows depending on transmission type and state of registration:

Manual: Will not pass high altitude emission standards (applies only to vehicles registered in Colorado, Nevada, New Mexico and Utah).

Automatic: Will not pass Federal Emission Standards (applies to vehicles registered in all states except California).

To correct this condition, dealers are to install a new PROM in affected vehicles. Automatic transmission equipped vehicles will also have the spark delay valve replaced.

VEHICLES INVOLVED

Involved are certain 1986 Chevrolet Spectrum model vehicles with 1.5L engines built within the following VIN breakpoints:

PLANT YEAR MODEL PLANT CODE FROM THROUGH ---- ----- ----- ----- ---- ------- 1986 R-Car Fujisawa "8" G8400036 G8498286

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 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 has no involved vehicles currently assigned.

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

All unsold new vehicles in dealers' possession and subject to this campaign must be held and inspected/repaired per the service procedure of this campaign bulletin before owners take possession of these vehicles.

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.

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

In summary, whenever a vehicle subject to this campaign enters your vehicle inventory, or is in your dealership for service in the future, please take the steps necessary to be sure the campaign correction has been made before selling or releasing the vehicle.

PARTS INFORMATION

Parts required to complete this campaign are to be obtained from General Motors Service Parts Operations (GMSPO). To ensure these parts will be obtained as soon as possible, they should be ordered from GMSPO on a "C.I.O." order with no special instruction code, but on an advise code (2).

Quantity/ Part Number Description Vehicle ----------- ----------- --------- 16161344 PROM - Manual Transmission Vehicles 1 (High-Altitude States Only)

16161347 PROM - Automatic Transmission Vehicles 1

94249018 Spark Delay Valve - (For Automatic 1 Transmission Vehicles Only)

NOTICE: Please order initial campaign parts based on previous emission campaign experience.

SERVICE PROCEDURE

1. Disconnect battery ground cable.

2. Remove right side (passenger) kick panel.

3. Remove ECM connector and remove rubber band over ECM.

4. Remove ECM.

5. Remove PROM.

6. Install new PROM.

7. Reinstall ECM.

8. Reinstall rubber band over ECM and reinstall ECM connector.

9. Reinstall right side (passenger) kick panel.

10. For vehicles with automatic transmissions perform the following steps. Proceed to step 11 for vehicles with manual transmissions.

a. Locate spark delay valve on engine compartment dash panel between vacuum switch valve and ventilation valve.

b. Remove spark delay valve.

c. Install new spark delay valve.

11. Reconnect negative battery cable.

12. Install Campaign Identification Label.

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 the five (5) digit dealer code of the dealer performing the campaign service. This information may be inserted with a typewriter or a 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. Additional "Campaign Identification Labels" can be obtained from DAC.

Apply "Campaign Identification Label" only on a clean, dry surface.

CLAIM INFORMATION

Submit a Product Campaign Claim with the information indicated below:

* FAILED PARTS CC-FC LABOR LAB OTH REPAIR PERFORMED PC PART NO. ALLOW OP HRS HRS ---------------- -- -------- ----- ------ ----- --- ---

Install New PROM - Manual Transmission 1 16161344 ** SK-00 V7420 0.3 0.1 Vehicle

Install New PROM & Spark Delay Valve 2 16161347 ** SK-00 V7421 0.3 0.1 - Automatic Trans. Vehicle

*Campaign Administrative Allowance.

**The "Parts Allowance" should be the sum total of the current GMSPO Dealer Net price plus 30% of all parts required for the repair.

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

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

Dear 1986 Chevrolet Spectrum Owner:

This notice is sent to inform you that Chevrolet Motor Division is conducting an emission recall campaign that includes your vehicle.

REASON FOR THIS RECALL

Manual Transmission Vehicles: Will not pass high altitude emission standards (applies only to vehicles registered in Colorado, Nevada, New Mexico and Utah).

Automatic Transmission Vehicles: will not pass Federal Emission Standards (applies to vehicles registered in all states except California).

WHAT WE WILL DO

To correct this condition, your dealer will install a new PROM (computer chip) in your Spectrum. Automatic transmission equipped vehicles will also have the spark delay valve replaced. This service will be performed for you at no charge.

WHAT YOU SHOULD DO

Please contact your Chevrolet dealer as soon as possible to arrange a service date and to assure parts availability. Instructions for making this correction have been sent to your dealer. Please ask your dealer if you wish to know how much time will be needed to schedule and process your vehicle.

The enclosed owner reply card identifies your vehicle. Presentation of this card to your dealer will assist in making the necessary correction in the shortest possible time. If you have sold or traded your vehicle, please let us know by completing the postage paid reply card and returning it to us. Should your dealer not schedule a service date within a reasonable time, you should contact the Chevrolet Customer Assistance Center by calling 1-800-222-1020.

If your dealer and the Customer Assistance Center are unable to remedy this condition within a reasonable time, you may wish to advise the Environmental Protection Agency at the following address: Director, Manufacturer's Operations Division (6405J), United States Environmental Protection Agency, 401 M Street. S.W., Washington, D.C. 20460.

To ensure your full protection under the emission warranty made applicable to your vehicle by State or 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 lack of proper maintenance of your vehicle. Also, your vehicle may fail a state or local emission inspection if this recall is not accomplished.

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

Chevrolet Motor Division GENERAL MOTORS CORPORATION

Enclosure

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.