CAMPAIGN: EMISSION NON- COMPLIANCE-REPLACE PROM. Geo Spectrum 1988

SUBJECT EMISSIONS NONCOMPLIANCE

MODELS: 1988 Isuzu I-Mark W/1.SL Engine

TO: ALL GENERAL MOTORS DEALERS:

General Motors of Canada Limited has determined that certain 1988 Isuzu I-Mark model vehicles with 1.5L engines exceed Transport Canada standards for Carbon-Monoxide (CO) emissions. As a result, these vehicles may fail Transport Canada mandated emission tests.

To correct this condition, dealers are to replace the PROM in vehicles with manual transmissions or replace the spark delay valve in vehicles with automatic transmissions.

VEHICLES INVOLVED:

Involved are, certain 1988 Isuzu I-Mark model vehicles with 1.5L engines within the following VIN breakpoints:

Plant Year Model Plant Code From Through 1988 R-Car Fujisawa "7" SOP EOP

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:

All unsold new vehicles in dealer's 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 perform this campaign on all involved vehicles at no charge to owners, regardless of kilometres traveled, age of vehicle, or ownership, from this time forward.

Owners of vehicles recently sold from your new vehicle inventory with no owner information indicated on the dealer listing, are to be contacted by the dealer, and arrangements made to make the required correction according to instructions contained in this bulletin. This could be done by mailing to such owners a copy of the owner letter accompanying this bulletin. Campaign follow- up cards should not be used for this purpose, since the owner may not as yet have received the notification letter.

In summary, whenever a vehicle subject to this campaign is taken into your new or used 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.

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 (see copy of owner letter included with this bulletin). The listings provided are for campaign activity only and should not be used for any other purpose.

PARTS INFORMATION:

Parts required to complete this campaign should be ordered through regular channels, as follows:

Part Number Description Quantity/Vehicle 16190397 PROM - Manual Transmission Vehicles 1 94429763 Spark Delay Valve - Auto. Trans. Vehicles 1

PARTS AND LABOUR CLAIM INFORMATION:

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

Repair Code Description Time Allowance 2A Replace PROM - Manual Transmission Vehicle 0.4 3A Replace Spark Delay Valve-Auto. Transmission Vehicle 0.3

Time allowance includes 0.1 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:

Manual Transmission Vehicles

1. Disconnect battery ground cable.

2. Remove passenger's side kick panel.

3. Pull ECM out but do not disconnect cable.

4. Following instructions included with new PROM, remove old PROM from ECM and replace it with new PROM.

5. Reinstall and connect ECM and kick panel.

6. Reconnect battery and install Campaign Identification Label.

Automatic Transmission Vehicles

A. Raise vehicle hood and locate spark delay valve between air induction valve and vacuum switching valve (see Figure 1, below).

B. Remove spark delay valve.

C. Install new spark delay valve with red plastic end facing toward vacuum switching valve.

D. Install Campaign Identification Label and close vehicle hood.

INSTALLATION OF CAMPAIGN IDENTIFCATION 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.

General Motors of Canada bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer." They are written to inform these 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 your General Motors dealer for information on whether your vehicle may benefit from the information.

Dear General Motors Customer:

To correct this condition, your dealer will replace the PROM in vehicles with manual transmissions or replace the spark delay valve in vehicles with automatic transmissions.

This service will be provided for you at no charge.

Please contact your GM dealer as soon as possible to arrange a service date.

If parts are required, ask your dealer for details regarding their availability. If parts are not in stock, they can be ordered before scheduling your service date.

This letter identifies your vehicle. Presentation of this letter to your dealer win assist their Service personnel in completing the necessary correction to your vehicle in the shortest possible time. We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your continued satisfaction with our products.

Customer Support Department General Motors of Canada Limited

Object Number: 79931 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.