K 20 3/4 Ton Pickup 4WD V8-379 6.2L DSL VIN C FI (1982)
Technical Service Bulletin # 82C30
Date: 830301
Campaign - Incorrect Speedometer Gear
Number:
82C30
Section:
VII
Date:
March, 1983
Subject:
PRODUCT CAMPAIGN 82C30 INCORRECT SPEEDOMETER DRIVEN GEAR 1982 K20 LIGHT DUTY CHEVROLET TRUCKS
TO ALL INVOLVED CHEVROLET DEALERS
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 drivedriven 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 50 mph, the speedometer will indicate approximately 40 mph.
To correct this condition, the speedometer driven gear and sleeve assemblies will be replaced in all involved vehicles.
Vehicles Involved, Service and Parts Information
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
CS119087
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
