Defect, Vehicle and Dealer Information

CONDITION

General Motors has determined that a defect which relates to motor vehicle safety exists in some 1984 through 1988 Buick model vehicles equipped with Cruise Control (RPO K34) and certain gasoline and 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 intemittent 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

Certain 1984 through 1988 Buick vehicles equipped with Cruise Control (RPO K34) and engines, as listed, within the following vehicle breakpoints:

ENGINE
YEAR MODEL MODEL NAME VIN CODES FROM THROUGH AND INCLUDING

1984 G Regal V (262 DSL) S.O.P. E.O.P.
B LeSabres and (370) Y, N (350 DSL) S.O.P. E.O.P.
LeSabre/Electra Estate Wagon
D Electra/Park Avenue Y S.O.P. E.O.P.
E Riviera Y, N S.O.P. E.O.P.

1985 B LeSabre and Y, N S.O.P. E.O.P.
LeSabre/Electra Estate Wagon
E Riviera Y, N S.O.P. E.O.P.

1986 G Rega 1 Y S.O.P. E.O.P.
B LeSabre/Electra Y S.O.P. E.O.P.
Estate Wagon

1987 G Regal Y S.O.P. E.O.P.

1988 B LeSabre/Electra Y S.O.P. JA404650
Estate Wagon

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. Buick 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 number of vehicles may have had part number 25074629 and part number 12335036 servos installed beyond warranty; those vehicles must be identified by inspection.

DEALER ACTION

To prevent this condition, dealers are to inspect and if required, install a bushing kit on the cruise control servo bail. The cruise control servo assembly is not authorized as a replacement to correct for a missing or out of place bushing. Also, if other repairs are needed to the cruise control system, and the vehicle is out of warranty, that repair would be at the owners expense.
DEALER CAMPAIGN RESPONSIBILITY

Dealers are to perform this campaign on all involved vehicles at no charge to the owner, regardless of mileage, age of vehicle, or ownership from this time forward. Whenever a vehicle subject to this campaign is taken into your used car inventory, dealers are to take the steps necessary to be sure the campaign correction has been made before reselling or releasing the vehicle.

Owners of vehicles recently sold from your vehicle inventory are to be contacted by the dealer and arrangements made to make the required modification according to instructions contained in this bulletin.

In addition, dealers are to perfom the campaign on all affected vehicles as they are brought in for any kind of service.

DEALER MATERIAL

If your dealership has vehicles involved in this campaign, you will receive the following items:

- Listing of all vehicles involved in this campaign in the area of your dealership.

- One (1) Campaign Identification Label per vehicle involved.

Involved vehicles have been identified by Vehicle Identification Number computer listings. Computer listings contain the complete identification number, owner name and address data, and are furnished to the involved dealers with the campaign bulletin. Owner name and address data will enable dealers to follow-up with owners involved in this campaign.

These computer 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.