Dealer, Owner & Parts Information

DEFECT INVOLVED

General Motors has determined that a defect which relates to motor vehicle safety exists in some 1983 (G) cars equipped with 5.7 liter V-8 diesel engines. The rear brake master cylinder brake pipe may rub on the air cleaner resonator bracket. Over an extended period of operation, the brake pipe could wear through, resulting in a brake fluid leak and loss of the rear brakes. These vehicles are equipped with dual braking systems, part of the system will still work and allow the vehicle to be stopped, but over a greater distance. Loss of rear braking at a time when minimum stopping distance is required could result in a vehicle crash without prior warning.
DEALER ACTION

To prevent the possibility of this condition occurring on vehicles involved, dealers are to make sure there is a minimum of 19 mm (3/4 inch.) clearance between the brake pipe and resonator bracket. If there is not, they must reposition pipe to provide this clearance. Also if this pipe is worn due to contacting the bracket, the pipe is to be replaced.

DEALER CAMPAIGN RESPONSIBILITY

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.

Whenever a vehicle subject to this campaign is taken into your new or used vehicle inventory, or it is in your dealership for service in the future, you should 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 new vehicle inventory are to be contacted by the dealer, and arrangements made to make the required modification according to instructions contained in this bulletin.

VEHICLES INVOLVED

1983 Regals equipped with 5.7L (VIN code N) V-8 diesel engines within the following serial numbers:

Assembly Plant Beginning Up to and Including

Flint DH800001 DH 970721

Arlington DR400001 DR 421521

DEALER MATERIAL

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

^ List of all vehicles involved in their campaign shipped to 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 Vehicle Identification Number, Owner Names 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 for the follow-up necessary to complete this campaign.
TRANSFER OF VEHICLE

If a vehicle has been transferred or sold to another location, please forward Campaign Identification Label and vehicle information for this vehicle to your Buick Zone Office for handling with the proper dealer.

CHANGE OF OWNER INFORMATION

Dealers are to use the Dealer Communication System (D..C.S.) to provide Buick Motor Division with subsequent Buick Owner Information. By reporting a change of owner name or address of a vehicle in Campaign status over the D.C.S., the need to send in an S-866 Form for that vehicle is eliminated. Terminal input instructions are covered in the D.C.S. Manual under Section 9, Page 9-J01A and B.

OWNER NOTIFICATION

Owners of vehicles involved in this campaign will be notified by Buick Motor Division (See copy of owner letter included with this Bulletin).

PARTS INFORMATION

Brake Pipe, Part Number 25513371, if required for this campaign is to be obtained from WDDGM. Very few pipes will require replacement on vehicles inspected.

To ensure this part will be obtained as soon as possible, it should be ordered from GM Part (WDDGM) on a C.I.O. order with no special instruction code, but order on an advised code (2).

Parts will be available approximately October 31, 1983.