CAMPAIGN: INCORRECT PCM CALIBRATION (CANADA ONLY)
SUBJECT: INCORRECT PCM CALIBRATION (CANADA ONLY) -------------------------
Models: 1996 Chevrolet and GMC 'S' Trucks with 2.2L Engine (RPO LN2) ------------------------------------------------------------
TO: ALL GENERAL MOTORS DEALERS
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General Motors of Canada Limited has decided that CERTAIN 1996 Chevrolet and GMC 'S' Trucks equipped with the 2.2L (RPO LN2) engine were built with incorrect calibrations in the PCM.
To correct this condition, dealers are to re-calibrate the PCM on affected vehicles with the correct calibration.
VEHICLES INVOLVED:
Involved are CERTAIN 1996 Chevrolet and GMC 'S' Truck model vehicles equipped with the 2.2L (RPO LN2) engine, built within the following VIN breakpoints:
Year Model Plant Plant Code From Through ---- ----- ----- ---------- ---- -------
1996 Chevrolet S-10 Linden K TK100001 TKI75499 1996 Chevrolet S-10 Shreveport 8 T8100001 T8166638 1996 GMC Sonoma Linden K TK500001 TK515830 1996 GMC Sonoma Shreveport 8 T8500001 T8518505 .
NOTE: PLEASE CHECK DCS SCREEN 445 OR YOUR V.I.N. LISTING BEFORE PERFORMING CAMPAIGN TO ENSURE THAT THE VEHICLE IS AFFECTED. ONLY AFFECTED VIN'S WILL BE PAID.
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 performing 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 camnpaign 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:
The correct calibrations for these vehicles is contained on the Techline CD-ROM Disc #5 which was received by your dealership in early March 1996.
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 Re-calibrate PCM .6
Time allowance includes 0.1 hour for dealer administrative detail associated with this campaign.
SERVICE PROCEDURE:
These vehicles have electronically re-programmable PCM'S. The correct calibrations are available on the Techline CD-ROM Disc #5, which was sent to your dealership in March 1996.
1. Re-calibrate the PCM according to the latest Techline information on re-programming procedures, using Disc #5 or a later release. If you require assistance with reprogramming the PCM, contact the Techline Customer Support Centre (TCSC) at 1-800-828-6860 (English ) or 1-800-503-3222 (French) for instructions.
2. Install Campaign Identification Label.
NOTE: ALTHOUGH ALL AFFECTED VEHICLES WILL REQUIRE RE-CALIBRATION, THE FOLLOWING INFORMATION AND CHART ARE PROVIDED AS AN AID TO DETERMINE WHETHER A VEHICLE HAS THE CORRECT CALIBRATION. THE PROM ID CAN BE CHECKED WITH A TECH-1. THE CORRECT CALIBRATION (AND PROM ID) FOR A VEHICLE IS DETERMINED BY THE TRANSMISSION AND AXLE RATIO OPTIONS. THESE OPTIONS ARE IDENTIFIED BY RPO CODE ON THE SERVICE PARTS IDENTIFICATION LABEL.
ENGINE RPO TRANSMISSION RPO AXLE RPO PROM ID ---------- ---------------- -------- -------
LN2 M30 (automatic) GT5 (4. 1 0 ratio) 5303 LN2 MW2 (manual) GT5 (3.73 ratio) 5273 LN2 MW2 (manual) GT5 (4. 1 0 ratio) 5283
INSTALLATION OF CAMPAIGN IDENTIFICATION 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 camnpaign has been completed.
March, 1996
Dear General Motors Customer:
General Motors of Canada Limited has decided that CERTAIN 1996 Chevrolet S-10 and GMC Sonoma model vehicles equipped with the 2.2L engine were built with incorrect calibrations in the PCM (Powertrain Control Module).
To correct this condition, your dealer will re-calibrate the PCM with the correct calibrations.
This service will be provided for you at no charge.
Please contact your GM dealer as soon as possible to arrange a service date.
This letter identifies your vehicle. Presentation of this letter to your dealer will 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 Departinent General Motors of Canada Limited
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.
