CAMPAIGN:ENGINE OIL COOLER INLET HOSE

SUBJECT: ENGINE OIL COOLER LINE CONTACTS STEERING GEAR

MODELS AFFECTED: CERTAIN 1994 BUICK ROADMASTER SEDANS AND ESTATE WAGONS

The National Traffic and Motor Vehicle Safety Act, as amended, provides that each vehicle which is subject to a recall campaign of this type must be adequately repaired within a reasonable time after the owner has tendered it for repair. A failure to repair within sixty (60) days after tender of a vehicle is prima facie evidence of failure to repair within a reasonable time.

If the condition is not adequately repaired within a reasonable time, the owner may be entitled to an identical or reasonably equivalent vehicle at no charge to a refund of the purchase price less a reasonable allowance for depreciation.

To avoid having to provide these burdensome solutions, every effort must be made to promptly schedule an appointment with each owner and to repair their vehicle as soon as possible. As you will see in reading the attached copy of the letter that is being sent to owners, the owners are being instructed to contact the Buick Customer Assistance Center if their dealer does not remedy the condition within five (5) days of the mutually agreed upon service date. If the condition is not remedied within a reasonable time, they are instructed on how to contact the National Highway Traffic Safety Administration.

DEFECT INVOLVED:

General Motors has determined that a defect which relates to motor vehicle safety exists in certain 1994 Buick Roadmaster model vehicles equipped with engine oil coolers (RPO KC4) and 5.7L (RPO LT1) engines. The engine oil cooler inlet hose on these vehicles may have been installed too close to the steering gear. The hose may wear through if the slit in the protective sleeve on the hose faces and contacts the steering gear. This wear through could allow engine oil to leak onto the engine and could cause an engine compartment fire.

To prevent the possibility of this condition occurring, dealers are to inspect the engine oil cooler inlet hose and, as necessary, reposition the hose to create the proper clearance and assure that the protective sleeve slit faces the proper direction. Also, if hose wear is evident, the hose will be replaced.

VEHICLES INVOLVED:

Involved are certain 1994 Buick Roadmaster model vehicles equipped with engine oil coolers and 5.7L engines and built within the following VIN breakpoints:

PLANT PLANT CODE FROM THROUGH & INCLUDING ----- ---------- ---- ------------------- Arlington R RR400001 RR400740

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.

OWNER NOTIFICATION:

Owners will be notified of this campaign on their vehicles by Buick Motor Division (see copy of owner letter included with this bulletin).

DEALER CAMPAIGN RESPONSIBILITY:

All unsold new vehicles in dealers' possession and subject to this campaign must be held and inspected/repaired per the service procedure of this campaign bulletin before owners take possession of these vehicles.

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.

Owners of vehicles recently sold from your vehicle inventory with no owner information indicated on the dealer listing, are to be contacted by the dealer, and arrangements made to make the required correction according to the instructions contained in this bulletin. This could be done by mailing to such owners a copy of the owners letter accompanying this bulletin. Campaign follow-up cards should not be used for this purpose, since the owner may not as yet have received the notification letter.

In summary, whenever a vehicle subject to this campaign enters your vehicle inventory, or is in your dealership for service in the future, please take the steps necessary to be sure the campaign correction has been made before selling or releasing the vehicle.

PARTS INFORMATION:

IMPORTANT: DUE TO THE SMALL NUMBER OF VEHICLES INVOLVED, DEALERS ARE ENCOURAGED NOT TO ORDER CAMPAIGN PARTS FOR USE AS SHELF STOCK. PARTS SHOULD ONLY BE ORDERED WHEN INSPECTION DETERMINES THAT IT IS NECESSARY TO REPLACE AN ENGINE OIL COOLER INLET HOSE. ONLY AN ESTIMATED 10% OF INVOLVED VEHICLES WILL REQUIRE HOSE REPLACEMENT.

Parts required to complete this campaign are to be obtained from General Motors Service Parts Operations (GMSPO). To ensure these parts will be obtained as soon as possible, they should be ordered from GMSPO on a "C.I.O." order with no special instruction code, but on an advise code (2).

PART NUMBER DESCRIPTION QUANTITY/VEHICLE ----------- ----------- ---------------- 10239698 Engine Oil Cooler Inlet Hose 1 as required

SERVICE PROCEDURE:

INSPECTION:

---------- Locate engine oil cooler inlet hose and inspect to assure that hose shows no evidence of contact with steering gear and that hose has at least 25mm (1 inch) clearance from steering gear (see figure 1).

A. If hose has at least 25mm(1 inch) clearance and shows no evidence of contact, no repair is required. Install Campaign Identification Label and return vehicle to owner or dealer stock.

B. If hose has less than 25mm (1 inch) clearance and/or shows evidence of contact (witness marks , rotate and inspect, hose for sign of wear.

o If there is evidence of wear on hose (slight wear on conduit is acceptable), replace hose assembly following procedures in 1994 Service Manual.

o If there is no evidence of wear on hose, reroute hose as described in "Rerouting Procedure below.

REROUTING PROCEDURE:

1. Loosen upper engine oil cooler inlet hose to oil cooler fitting but do not disconnect.

2. Rotate hose a half (1/2) turn so that it is approximately 25mm (1 inch) away from power steering gear bolt (see figure 1, page 4).

3. Tighten fitting with hose in position using caution that hose does not rotate back to original position while tightening.

4. Assure orientation of conduit. Open side of hose conduit should be facing away from steering gear.

5. Run vehicle and check for leaks. Check and fill oil level as required.

6. Install Campaign Identification Label.

CAMPAIGN IDENTIFICATION LABEL:

Each vehicle corrected in accordance with the instructions outlined in this Product Campaign Bulletin will require a "Campaign Identification Label." Each label provides a space to include the campaign number and the five (5) digit dealer code of the dealer performing the campaign service. This information may be inserted with a typewriter or a ball point pen.

Each "Campaign Identification Label" is to be located on the radiator core support in an area which will be visible when the vehicle is brought in for periodic servicing by the owner.

Apply "Campaign Identification Label" only on a clean, dry surface.

WARRANTY INFORMATION:

PART FAILED PART FAILURE LABOR LABOR OTHER NET OPER COUNT PART NO. ALLOW CODE OP NO. HRS. AMT. ------------------------------------------------------------------------- o Inspect Oil Cooler Inlet Hose - Proper Clearance Already Preset

-- -- -- 96 V8650 0.2 *0.1 -- o Inspect Oil Cooler Inlet Hose - Hose Rerouted - No Signs of Wear

-- -- -- 96 V8651 0.2 *0.1 -- o Inspect Oil Cooler Inlet Hose - Hose Replacement Performed Due to Signs of Wear

1 10239698 ** 96 V8652 0.4 *0.1 ***

* Campaign Administrative Allowance

** The "Parts Allowance" should be the sum total of the current GMSPO Dealer Net price plus 40% of all parts required for the repair.

*** The amount identified in the "Net Amount" column should represent the sum of the current GMSPO Dealer Net price plus 40% for 4oz. engine oil used to perform the required repairs.

Dear Buick Roadmaster Owner:

This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act.

SAFETY DEFECT:

General Motors has determined that a defect which relates to motor vehicle safety exists in certain 1994 Roadmaster model vehicles equipped with engine oil coolers (RPO KC4) and 5.7L (RPO LT1) engines. The engine oil cooler inlet hose on these vehicles may have been installed too close to the steering gear. The hose may wear through if the slit in the protective sleeve on the hose faces and contacts the steering gear. This wear through could allow engine oil to leak onto the engine and could cause an engine compartment fire.

ACTION:

------ To prevent the possibility of this condition occurring, your dealer will inspect the engine oil cooler inlet hose and, as necessary, reposition the hose to create the proper clearance and assure that the protective sleeve slit faces the proper direction. Also, if hose wear is evident, the hose will be replaced. This service will be performed for you at no charge.

CONTACTING YOUR DEALER:

Please contact your Buick dealer as soon as possible to arrange a service date and so the dealer may order the necessary parts for the repair. Instructions for making this inspection/correction have been sent to your dealer and parts are available. The labor time necessary to perform this service correction is approximately 20 minutes. Please ask your dealer if you wish to know how much additional time will be needed to schedule and process your vehicle.

Your Buick dealer is best equipped to obtain parts and provide service to ensure that your vehicle is corrected as promptly as possible. If, however, you take your vehicle to your dealer on the agreed service date, and they do not remedy this condition on that date or within five (5) days, we recommend you contact the Buick Customer Assistance Center by calling 1-800-521-7300.

After contacting your dealer and the Customer Assistance Center, if you are still not satisfied that we have done our best to remedy this condition without charge and within a reasonable time, you may wish to write the Administrator, National Highway Traffic Safety Administration, 400 Seventh Street, S.W., Washington, D.C. 20590 or call 1-800-424-9393 (Washington D.C. residents use 366-0123).

OWNER REPLY CARD:

The enclosed owner reply card identifies your vehicle. Presentation of this card to your dealer will assist in making the necessary correction in the shortest possible time. If you have sold or traded your vehicle, please let us know by completing the postage paid reply card and returning it to us.

We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your safety and continued satisfaction with our products.

Buick Motor Division GENERAL MOTORS CORPORATION

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.