Defect and Vehicles Involved

DEFECT INVOLVED

General Motors has determined that a defect which relates to motor vehicle safety exists in some 1984 through 1988 Pontiac model vehicles equipped with cruise control on certain gasoline & diesel engines. A small nylon bushing in the cruise control servo bail (bracket) may slip out of place. This will not affect the operation of the cruise control, but it may cause intermittent increases in engine speed or dieseling (engine run-on with ignition off). If the vehicle is not serviced and the nylon bushing remains out of place, the servo rod assembly could wear through the bail. If the rod wears through the bail, it may catch on other engine components and possibly result in a stuck throttle. Although the vehicle can still be stopped with the service brake, an unexpected loss of accelerator control could result in a vehicle crash.
VEHICLES INVOLVED

Involved are certain 1984 through 1988 Pontiac vehicles equipped with Cruise Control (RPO K34) and 5.OL or 5.7L engines within the following VIN breakpoints:

Engine Beginning Up To
Year Model Model Name VIN Codes VIN And Including

1984 G Grand Prix N EB200005 EB250584
N E2205277 E2306770

B Parisienne N EX202262 EX225153
N E9701426 E9743876

1985 B Parisienne N FX200001 FX268502

1986 B Parisienne Y GX201816 GX285088

1987 B Parisienne Y HA200001 HA207717
Y HX200001 HX211350

1988 B Parisienne Y JA200001 JA202809
Y JX200001 JX200001

Vehicles with Part Number 25074629 or Part Number 12335036 replacement Cruise Control Servos do not require the Bushing Kit called for in this Product Campaign Bulletin. Pontiac has eliminated a number of vehicles from this campaign which it was able to identify from warranty records as having the above replacement Servos installed. However, a large number of vehicles may have had the P/N 25074629 and P/N 12335036 Servos installed beyond warranty; those vehicles must be identified by inspection.

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 the 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.