CAMPAIGN:INCORRECT SPEEDOMETER DRIVEN GEAR. Chevrolet Chevy K Pickup

Subject: PRODUCT CAMPAIGN 82C30 INCORRECT SPEEDOMETER DRIVEN GEAR 1982 K20 LIGHT DUTY CHEVROLET TRUCKS EQUIPPED WITH RPO'S LH6 (DIESEL ENGINE), MM7 (4-SPEED OVERDRIVE MANUAL TRANSMISSION) AND GT4 (3.73 RATIO REAR AXLE)

General Motors has determined that some 1982 K20 Chevrolet Light Duty Trucks equipped with RPO LH6 (diesel engine), MM7 (4-speed overdrive manual transmission) and GT4 (3.73 ratio) rear axle were assembled with the incorrect drive- driven gear and sleeve assembly.

The incorrect speedometer driven gear will result in the speedometer indicating a vehicle speed which is approximately 20% slower than the actual vehicle speed. For example, when the actual vehicle speed is 50mph, the speedometer will indicate approximately 40mph.

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

VEHICLES INVOLVED

Involved are some 1982 K20 Chevrolet Light Duty Trucks equipped with RPO LH6 (diesel engine), RPO MM7 (4-speed overdrive manual transmission) and RPO GT4 (3.73 ratio) rear axle within the following parameters:

Plant From Through ------ -------- -------- Flint CF306452 CF314995

Janesville CJ101939 CJ118895

St. Louis CS103268 CS110987

Oshawa C1104261 C1134075

Fremont (1) Unit CZ103440

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. Any dealer not receiving a computer listing with the campaign bulletin was not shipped any involved vehicles.

OWNER NOTIFICATION

Owners will be notified of this campaign on their vehicles by Chevrolet Motor Division (see copy of Owner Letter included with this bulletin).

DEALER CAMPAIGN RESPONSIBILITY

This recall campaign is to be performed at no charge to owners on all affected vehicles regardless of time, mileage, or ownership. Dealers are to inspect and correct all affected vehicles in new and used vehicle stock prior to their sale.

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.

SERVICE PROCEDURE

Removal and installation procedure for replacing the driven gear and sleeve may be found in the 1982 Light Duty Truck 10-30 Series Shop Manual, on Pages 7B3-2 and 7B3-3, titled "89mm Manual Transmission-Speedometer Driven Gear".

Upon completion of this modification, install the "Campaign Identification Label" according to the instructions contained in this bulletin.

PARTS-INFORMATION

Dealers are requested to order the parts required to complete this campaign from Warehousing and Distribution Division of General Motors.

Part Numbers Quantity Per Vehicle Description ------------ -------------------- ------------ 6264903 1 "O" Ring Seal 14018671 1 Upper Seal

1362294 1 Sleeve

The following list identifies the correct speedometer-driven gear to use when making this replacement.

If old gear is or tires are Procure this gear 43 teeth (purple) 7.50 R16 D On/Off Rd. 1359270 36 teeth (white) 44 teeth (gray) LT235/85 R16 D LT235/85 R16 E 7.50 R16 D Hwy 45 teeth (Lt Blue)LT215/85 R16 C 1359272 38 teeth (blue)

CLAIM INFORMATION

Submit a Product Campaign Claim with the information indicated below:

Parts Failed **Parts Failure Labor Labor *Other Count Part No. Allowance Code Operation Hours Hours ----- -------- --------- ------ --------- ----- ----- 4 1359270 00 V1590 .3 .1

Description: Remove incorrect driven gear and install new speedometer driven gear and sleeve.

*Campaign Administrative Allowance

**The Parts Allowance should be the sum total of the current WDDGM Dealer Net plus 30% of all parts required for the repair.

Dealers will automatically receive the correct parts and labor allowance based on the Labor Operation performed.

Refer to the Chevrolet Claims Processing Manual for details on Product Campaign claim submission.

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 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

REFER TO THE CURRENT CHEVROLET SERVICE POLICIES AND PROCEDURES MANUAL AND CLAIMS PROCESSING MANUAL FOR CAMPAIGN HANDLING AND ADMINISTRATIVE PROCEDURES.

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.