CAMPAIGN:INCORRECT SPEEDOMETER DRIVEN GEAR - (A/T ONLY). GMC Truck Caballero 1985

For 1990-2009 cars

# CAMPAIGN:INCORRECT SPEEDOMETER DRIVEN GEAR - (A/T ONLY)

1985 CABALLEROS EQUIPPED WITH A THM 200-4R AUTOMATIC TRANSMISSION (RPO MW9) - BUILT AT RAMOS ARIZPE ONLY

General Motors has determined that some 1985 GMC Caballero models equipped with RPO MW9 (Automatic Transmission) may have been assembled with the incorrect speedometer driven gear assembly.

The incorrect speedometer driven gear will result in the speedometer indicating a vehicle speed which is approximately 10% slower than the actual vehicle speed. For example, when the vehicle speed is 55 mph, the speedometer will indicate approximately 50 mph.

To correct this condition, the speedometer driven gear will be replaced in all involved vehicles.

#### VEHICLES INVOLVED

Involved are certain 1985 Caballero models equipped with a THM 200-4R automatic transmission (RPO MW9) and built within the following VIN breakpoints.

Plant From Through ----- ----- -------- Ramos Arizpe FS800501 FS801366

The specific vehicles involved in this campaign have been identified by Vehicle Identification Number Computer Listings. These listings are furnished to all involved dealers with the campaign bulletin.

#### 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.

If no owner's name and address were available to GMC Truck at the time of campaign initiation, the dealer will determine the owner's name and address from the dealership sales records. Please provide this information directly on the second copy of the listing next to the applicable VIN, so that our records may be updated and the appropriate notification mailed to the owner. This second copy should then be submitted to the address listed below in the previously supplied yellow campaign envelopes.

GMC Truck General Motors Corporation 101 Union Street Plymouth, Michigan 48170

#### OWNER NOTIFICATION

Owners will be notified of this campaign on their vehicles by GMC Truck (see copy of Owner Letter included with this bulletin). A listing of owner names and addresses has been furnished to the involved dealers to enable dealers to follow up with owners involved in this campaign. This listing 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 this campaign.

#### SERVICE PROCEDURE

1. Raise vehicle.

2. Disconnect speedometer cable.

3. Remove retainer bolt and speedometer driven gear assembly as shown in Figure 200C-195, Page 20OC-49 of the 1985 Caballero Service Microfiche or 1985 Chevrolet Shop Manual (ST-329-85).

4. Inspect speedometer driven gear assembly. If vehicle is equipped with the incorrect speedometer driven gear (31 tooth/white), the correct gear (26 tooth/brown) should be installed.

5. Installation of speedometer driven gear is the reverse of removal. Retainer bolt should be torqued to 10-14 N.m. (7-10 ft-lbs).

6. Install "Campaign Identification Label" according to the instructions contained in this bulletin.

#### PARTS INFORMATION

The speedometer driven gear assembly, required for each vehicle involved, will be shipped to involved dealers by GMC Truck. Any questions as it pertains to parts shortages, etc., should be directed to your Zone Service Department. Qty. Per Part Number Description Vehicle ----------- ----------- ------- 25524922 Speedometer Driven 1 Gear Assembly (26 tooth/brown)

Parts are not to be ordered from or returned to the Warehousing Distribution Division General Motors (WDDGM).

#### WARRANTY INFORMATION

Dealers should submit an accurately filled out Warranty Repair Order on each vehicle completed under this campaign.

Labor Operation *Time ** Parts Trouble Number Description Allowance Allowance Code ------ ----------- --------- --------- ---- V Inspect speedometer 0.2 Hrs. - 96 driven gear assembly. No further action required.

V Inspect speedometer 0.3 Hrs. $1.94 96 driven gear assembly and install correct gear (26 tooth/brown).

* For dealer to receive Administration Time Allowance associated with this Campaign, add 0.1 hour to the Labor Operation Time Allowance.

** The $1.94 amount identified in the "Parts Allowance" column represents 30% of dealer net for parts that were furnished by GMC Truck. This amount is to be placed in the Net Item Amount Column of the claim and use type code "M".

#### CAMPAIGN IDENTIFICATION LABEL

Each vehicle modified 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 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.

#### ADMINISTRATIVE PROCEDURE

Procedures covering this campaign are outlined in Section V of your dealership's "GMC Truck Claims Processing Manual" issued April, 1983.

Dear GMC Truck Owner:

General Motors has determined that some 1985 Caballero models equipped with RPO MW9 (Automatic Transmission) may have been assembled with the incorrect speedometer driven gear assembly.

The incorrect speedometer driven gear assembly will result in the speedometer indicating a vehicle speed which is approximately 10% slower than the actual vehicle speed. For example, when the vehicle speed is 55 mph, the speedometer will indicate approximately 50 mph.

To correct this condition on your vehicle the speedometer will be inspected and when required replaced. This service will be performed for you at no charge.

Instructions for this service have been sent to your GMC Truck dealer. Please contact your dealer to arrange a service date. The labor time to inspect your vehicle is approximately 15 minutes. If the speedometer driven gear assembly must be replaced it will take an additional 20 minutes. Please ask your dealer if you wish to know how much additional time will be needed to process your vehicle.

The enclosed owner reply card identifies your vehicle. Presentation of this card to your dealer will assist him in making the correction to your vehicle 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.