CAMPAIGN: CONTROL CABLE LOCK- MECHANISM (INSTALL CLAMP)

MODELS: 1988 C/K TRUCKS EQUIPPED WITH CRUISE CONTROL (RPO K34)

DEFECT INVOLVED:

General Motors of Canada has determined that a defect which relates to motor vehicle safety exists on some 1988 Chev. & GMC C/K Model Trucks equipped with cruise control (RPO K34). The cruise control cable lock mechanism may self-disengage. When this occurs, vibrations can cause the cable to readjust by itself resulting in erratic cruise control operation or the throttle not returning to idle. In this event, engine speed may not decrease to a level anticipated by the operator. Although the vehicle can still be stopped with the service brake, loss of accelerator control could result in a vehicle crash, without prior warning.

To prevent this condition from occurring, it will be necessary to install a clamp around the lock tab of the cruise cable on all involved vehicles.

VEHICLES INVOLVED:

Involved are certain 1988 C/K Model Trucks built within the following VIN breakpoints:

Plant From Throuqh

GMC

1988 Oshawa sop J1503958

CHEV

1988 Oshawa sop J1111540

All affected vehicles have been identified by the VIN listing provided to involved Dealers with this bulletin. Any Dealer not receiving a listing was not shipped any of the affected vehicles.

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 requested modification according to instructions contained in this bulletin.

CAMPAIGN PROCEDURE:

Refer to Section 4 of the Service Policies and Procedures Manual for the detailed procedure on handling Product Campaigns. Dealers are requested to complete the campaign on all transfers as soon as possible.

OWNER NOTIFICATION:

All owners of record at the time of campaign release are shown on the attached computer listing and have been notified by first class mail from General Motors. The listings provided are for campaign activity only and should not be used for any other purpose.

PARTS INFORMATION:

Parts required to complete this modification should be ordered through regular channels, as follows:

Description Part Number Ouantity Per Vehicle

Hose Clamp 22537006 1

PARTS AND LABOUR CLAIM INFORMATION:

Credit for the campaign work performed will be paid upon receipt of a properly completed campaign claim card, RAPID terminal or DCS transmission in accordance with the following:

Repair Code Descriotion Time Allowance

2A Install Clamp .3

Time allowance includes 0.1 hour for Dealer administrative detail associated with this campaign. Parts credit will be based on Dealer net plus 30% to cover parts handling.

SERVICE PROCEDURE:

- Inspect cruise control cable to ensure it is secured at the cruise control module, engine bracket and T.B.I. lever stud, Figure No. 1. Make sure that T.B.I. lever is up against the idle screw (closed throttle position).

- Lock cable conduit engine fitting. If unlocked, push cable conduit engine fitting to locked position, Figure No. 2, View B.

- Using hose clamp, Part Number 22537006 or equivalent*,install it over the conduit engine fitting. Make sure it is centered over the fitting so that the clamp will hold it in the locked position, Figure No. 1, View A. Tighten clamp to 2 N.m (20 lbs. in.).

* A stainless steel worm gear type clamp capable of achieving a diameter of 1.25" with a band width of approximately .25" to .5".

INSTALLATION OF CAMPAIGN IDENTIFICATION LABEL

Clean surface of radiator upper mounting panel and apply a Campaign Identification Label. Make sure the correct campaign number is inserted on the label. This will indicate that the campaign has been completed.

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.