Recall - ECM Replacement: Overview

91chevy03

Number: 91C06


Section: 6E


Date: Dec., 1990


Subject: PRODUCT EMISSION CAMPAIGN 91C06 ELECTRONIC CONTROL MODULE (ECM) RESISTOR


Model and Year: 1991 GEO STORM (CALIFORNIA EMISSIONS ONLY)


TO: ALL CHEVROLET DEALERS


General Motors has determined that certain 1991 Geo Storm model vehicles may exhibit a condition in which the check engine light illuminates when engine coolant temperatures are below 68 degrees Fahrenheit. This condition is a result of an incorrect resistor in the Electronic Control Module's (ECM) Exhaust Gas Recirculation (EGR) diagnostic circuit.


To correct this condition, dealers are to install a new ECM in involved vehicles.

VEHICLES INVOLVED


Involved are certain 1991 Geo Storm model vehicles built within the following VIN breakpoints:

PLANT

YEAR MODEL PLANT CODE FROM THROUGH

1991 R-Car Fujisawa "7" M7500057 M7524134

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.