Recall - Fuel Injection Timing: Overview

Number: 91C32

Section: 6E

Date: July, 1992

Subject:
PRODUCT EMISSION CAMPAIGN 91C32 - FUEL INJECTION PUMP TIMING

Model and Year:
1991 C/K TRUCKS W/ 6.2L DIESEL ENGINES (RPO LH6) AND MANUAL TRANSMISSIONS

To:
Select Chevrolet Dealers

General Motors has determined that certain 1991 C/K trucks with 6.2L diesel engines (RPO LH6) and manual transmissions may have the incorrect fuel injection pump timing and cold advance schedules. These trucks may experience cold running problems and fail to meet applicable emission requirements.

To correct this condition, dealers are to install a new calibration PROM in all involved trucks. Dealers are also to inspect and, if necessary, retime the fuel injection pump.





VEHICLES INVOLVED

Involved are certain (86 total vehicles) 1991 C/K trucks with 6.2L diesel engines built within the VIN breakpoints.

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.





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.