CAMPAIGN: LOW VACUUM BRAKE MODULE NOT INSTALLED. Buick Electra/Park Avenue 1985

For 1990-2009 cars

# CAMPAIGN: LOW VACUUM BRAKE MODULE NOT INSTALLED

#### MODELS AFFECTED: 1985 ELECTRAS WITH 4.3L DIESEL ENGINES (VIN ENGINE CODE T)

#### CONDITION

General Motors has determined that some 1985 Electras equipped with diesel engines may have been assembled without the low vacuum brake module. Without this module, the "brake" warning light located above the speedometer would not be turned on if the vacuum in the brake booster should go to a low level.

#### DEALER ACTION

To correct this condition, dealers are to check to determine if the module was installed on vehicles involved and , if required, install the module. Dealers are to service all vehicles subject to this campaign 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 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

Certain 1985 Electras equipped with 4.3L Diesel Engines (engine VIN code T) within the following serial numbers:

From Through and Including ---- ---------------------- F1475972 F1501901

#### DEALER MATERIAL

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

List of all vehicles involved in this campaign shipped to your dealership.

One campaign identification label for each vehicle.

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.

#### 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).

#### 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 a C.V.A.R. form for that vehicle is eliminated. Terminal input instructions are covered in the D.C.S. Manual under Section 9, page 9-JOIA and B.

#### PARTS INVOLVED

Low vacuum brake module, part number 25516367, is to be obtained from GMWDD.

DO NOT ORDER A PART UNLESS YOU HAVE A VEHICLE TO C M PAIGN AS VERY FEW VEHICLES ARE INVOLVED.

So that parts will be obtained as soon as possible, they should be ordered from GMWDD on a C.I.O. order with no special instruction code, but order on an advise code (2).

#### TECHNICAL PROCEDURE

A. Inspection

1. With ignition "off," apply brake pedal until vacuum is depleted from brake booster (firm pedal is obtained).

2. With parking brake fully released, turn ignition to "on." Do not start engine.

a. If the "brake" warning light turns "on" in 15 to 45 seconds, no further action is required, except to install a campaign identification label (Part C of procedure).

b. If brake warning light does not turn "on" after waiting 45 seconds, install a low vacuum module, part number 25516367 (Part B of procedure).

B. Low Vacuum Module Installation

1. Disconnect cable from battery,

2. Remove right lower instrument panel insulator panel.

3. Remove and discard ECM harness shield. Refer to illustration.

4. Plug low vacuum module into its wiring connector. Refer to View A of illustration.

5. Tape module to ECM harness, as shown in illustration.

6. Reinstall insulator panel.

7. Reconnect battery cable.

8. Repeat step 2 of "Inspection" procedure to insure low vacuum warning system operates and correct as required.

9. Install Campaign Identification Label. (Part C of Procedure).

C. Campaign Identification Label Installation

Install a Campaign Identification Label. Each vehicle modified in accordance with the instruction outlined in this procedure will require a Campaign Identification Label. Each label provides a space to include the campaign number, the five (5) digit dealer code of the dealer performing the campaign service, and the date vehicle was campaigned. This information may be inserted with a typewriter or ballpoint pen. When installing label, clean the surface of the radiator upper mounting support and apply the campaign label where it is readily visible.

#### WARRANTY INFORMATION

#### USE THE ONE APPLICABLE OPERATION

SUBLET PART FAILED PARTS FAILURE LABOR LABOR OTHER DEALER OPER. COUNT PART NO. ALLOW. CODE OP. NO. HOURS HOURS MTL. TWG ----- ----- -------- ------ ---- ------- ----- ----- --------- Inspection Only - - - 96 V3140 .2 .1 -

Inspect and Replace Module 1 25516367 * ** 96 V3141 .4 .1 -

* List current dealer price of module plus 30%. ** .1 hour for administration.

Dear Buick Owner:

General Motors has determined that some 1985 Electras equipped with diesel engines may have been assembled without the low vacuum brake module. Without this module, the "brake" warning light located in the instrument panel above the speedometer would not be turned on if the vacuum in the brake booster should go to a low level. To correct this condition, your Buick Dealer will determine if the module was installed, and, if required, will install a module. This service will be done at no charge to you.

Instructions for making this correction have been sent to your dealer. Please contact your dealer to arrange a service date. The time required to perform this service is about 15 minutes. Please ask your dealer if you wish to know how much additional time will be necessary to process your vehicle.

The enclosed owner reply card identifies your vehicle. Presentation of this card to your dealer will assist you 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 owner 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 continued satisfaction with our products.

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.