For 1990-2009 cars

# CAMPAIGN:DECELERATION STALL

#### SUBJECT: DECELERATIONS STALLS

#### MODELS AFFECTED: CERTAIN 1995 PARK AVENUE AND RIVIERAS WITH 3800 SERIES II ENGINE (RPO L36)

General Motors has determined that certain 1995 Buick Park Avenue and Riviera model vehicles equipped with a 3800 Series II engine (L36) may have a deceleration stall under limited conditions. This could result in a loss of power steering assist, generator and power braking assist.

To prevent this condition from occurring, dealers are to replace suspect MEM-CAL of the Powertrain Control Module (PCM) with a MEM-CAL of an improved design.

#### VEHICLES INVOLVED

Involved are certain 1995 Buick Park Avenue and Riviera model vehicles equipped with a 3800 Series II engine (RPO L36, VIN K):

VEHICLE PLANT ENGINE THROUGH & MODEL PLANT CODE CODE FROM INCLUDING ----------------------------------------------------------------------- Park Avenue Buick City H K SH600014 SH606269

Riviera Orion 4 K S4700606 S4711014

#### NOTICE: Vehicles within this range, which our records indicate have had the MEM-CAL replaced with the new part numbers, have been deleted from the Vehicles Involved Listings.

Involved vehicles have been identified by Vehicle Identification Number computer listings. Computer listings contain the complete Vehicle Identification Number, owner name and address, 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.

#### PARTS INFORMATION

A pre-shipment will be sent to involved dealers the week of December 19, 1994.

Pre-shipment will equal parts for 30% of the number of vehicles to be repaired (minimum of one based on dealer listing). Pre-shipment parts will be charged to the dealers open parts account.

Additional 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).

#### NOTICE: To assist in ordering MEM-CALS, the to-be-done computer listing has an identifying code letter after the campaign number, as follows:

A - 16215799 B - 16215803 C - 16215810

NEW MEM-CAL OLD BROADCAST MEMCAL PART USAGE DESCRIPTION CODE I.D. QTY/VEH I.D. --------------------------------------------------------------------------- 16215799 Park Avenue MEM-CAL BNUW 5714 1 9674 w/F17 (2.84) 8764

16215803 Park Avenue MEM-CAL BNUX 5724 1 9644 w/FW2 (3.06) 8774

16215810 Riviera (3.05) MEM-CAL BNWA 5754 1 9634

#### OWNER NOTIFICATION:

Owners will be notified of this campaign on their vehicle 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 owner, 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 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 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.

#### SERVICE PROCEDURE

1. With ignition in the "OFF" position, open hood and disconnect negative battery cable.

2. Remove instrument panel right sound insulator.

3. Pull bottom of PCM away from mounting bracket and remove PCM from bracket.

4. Remove harness connectors from PCM.

5. Remove PCM from vehicle.

6. Remove MEM-CAL access cover.

7. Remove MEM-CAL by using thumb and first finger. Gently squeeze each end of the blue calibrator unit.

8. Install new MEM-CAL in PCM.

9. Install MEM-CAL access cover.

10. Install connectors to PCM.

11. Install PCM in mounting bracket.

12. Install instrument panel right sound insulator.

13. Install negative battery cable.

14. Perform on-board diagnostic system check.

15. If DTC P0325, P1361, P1350, or P1623 occurs or if the MIL (Service Engine Soon) light is "ON" constantly with no DTC's, the engine MEM-CAL is not fully seated or is defective.

16. Install Campaign Identification Label.

#### CAMPAIGN IDENTIFICATION LABEL

Each vehicle corrected in accordance with the instruction outlined in this bulletin will require a "Campaign Identification Label". Each label provides a space to include the five (5) digit dealer code of the dealer performing the campaign service. This information may be inserted with a typewriter or ballpoint 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 CLAIM INFORMATION

Submit a Product Campaign Claim using the information indicated below:

FAILED OTHER PART PART PARTS FAILURE LABOR LABOR LABOR OPER COUNT NUMBER ALLOW CODE OP NO HOURS HOURS ------------------------------------------------------------------------ o Replace MEM-CAL

1 16215799 ** 96 V9400 0.6 *0.1 16215803 or 16215810

* 0.1 hour for Campaign Administration 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.

#### COURTESY TRANSPORTATION CLAIM

Courtesy transportation supplied to customers within the program guidelines should be entered on the same repair order as the campaign repair using the Z79XX operations as appropriate.

In addition to the normal courtesy transportation labor operations, the following improvements have been made for this Buick campaign:

New "Z" operations:

Z3075 Same-day usage of a loaner vehicle. Limit of $30. No overnight requirement.

Z3076* Pick-up and delivery of vehicle at customer residence or business. Limit of $50.

Modified "Z" operation:

Z7910 Expanded to cover two-way shuttle, taxi, or ride.

* Note that Z3076 may be used in conjunction with Z7901 through Z7906 or Z3075 to provide customer with a loaner vehicle.

Dear Buick Owner:

This notice is sent to inform you that Buick Motor Division is conducting a Customer Satisfaction recall campaign, involving an emission component, that includes your vehicle.

#### RECALL FOR:

General Motors has determined that certain 1995 Buick Park Avenue and Riviera model vehicles equipped with a 3800 Series II engine may have a deceleration stall under limited conditions. This could result in loss of power steering assist, generator and power braking assist.

#### ACTION:

------ To prevent the possibility of this condition occurring, a component inside the Powertrain Control Module on your vehicle will be replaced with an improved design. 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 part for the repair. Instructions for providing this service have been sent to your dealer and parts are available. Please ask your dealer if you wish to know how much time will be needed to schedule and process your vehicle.

#### COURTESY TRANSPORTATION:

To minimize your inconvenience, Buick and Buick dealers offer various courtesy transportation options, including for this campaign, two-way shuttle service or a loaner. If these do not fit your needs, pick up and delivery of your vehicle is also being offered. Your dealer can advise you of the various options available to you when you schedule your appointment and courtesy transportation requirements.

#### OWNER REPLY CARD:

The enclosed owner reply card identifies your vehicle. Presentation of the card to your dealer will assist in providing the necessary service 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. Should your dealer not schedule a service date within a reasonable time, you should contact the Buick Customer Assistance Center by calling 1-800-521-7300. The Customer Assistance Center will assist you and the dealer in getting your vehicle serviced.

#### EMISSION WARRANTY:

To ensure your full protection under the emission warranty made applicable to your vehicle by Federal Law, and your right to participate in future recalls, it is recommended that you have your vehicle serviced as soon as possible. Failure to do so could legally be determined to be lack of proper maintenance of your vehicle. Also your vehicle may fail a state or local emission inspection test if the recall work is not accomplished.

Should your dealer find that your emission system has been intentionally disabled, you will be asked if you wish the system to be restored so that it will function as designed. The cost of such restoration will be your responsibility.

#### IMPORTANT MESSAGE FOR CALIFORNIA RESIDENTS:

(Calif. Only) ------------- The California Air Resources Board (CARB) requires that vehicle emission campaigns be completed prior to California registration renewal. Uncorrected emission recall campaigns will result in the inability to renew your California vehicle registration.

At the time of emission campaign completion, your California dealer will issue a "Campaign Certificate of Completion". Keep this certificate and, if required, present it to the Department of Motor Vehicles when renewing your California registration as proof of campaign completion.

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

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.