CAMPAIGN: DIST. CORROSION FORMING INSIDE DISTRIBUTOR
Subject: DISTRIBUTOR CORROSION
Models: 1989-91 C6D, C7D, C5H, C6H, C7H with 6.0L (LSO) Gas Engines
TO: ALL AFFECTED DEALERS:
General Motors of Canada has determined that certain 1989-91 C6D, C7D, C5H, C6H and C7H Trucks with 6.0L (LSO) fuel-injected gas engines may have corrosion forming in the distributor cap. This corrosion can eventually result in an engine misfire, causing an engine failure. To correct this condition, the existing distributor and/or cap will be replaced with new updated parts.
VEHICLES INVOLVED:
Involved are certain 1989-91 C6D, C7D, C5H, C6H and C7H Trucks with 6.0L (LSO) fuel-injected gas engines built within the following VIN breakpoints:
Model Year Make From Through ---------- ----------- ------ -------- 1989 GMC SOP EOP
Chevrolet SOP EOP
1990 GMC SOP EOP
Chevrolet SOP EOP
1991 GMC SOP MJ519849
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 perform this campaign on all involved vehicles at no charge to owners, regardless of kilometres traveled, 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, you are to ensure the campaign correction has been made before selling 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.
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 campaign should be ordered through regular channels, as follows:
Part Number Description Quantity/Vehicle ----------- ------------- ---------------- 1990 C5H, C6H and C7H Models Only: 1103920 Distributor Assembly 1
10108445 Gasket-Distributor 1
1989-90 C6D and C7D, and 1991 C5H, C6H and C7H Models Only: 10474757 Cap Assembly-Distributor 1 10496798 Rotor Assembly-Distributor 1
PARTS AND LABOUR CLAIM INFORMATION:
Credit for the campaign work performed will be paid upon receipt of a properly completed campaign claim card or DCS transmission in accordance with the following:
Repair Code Description Time Allowance ---------------- -------------------------- --------------- 1990 C5H, C6H and C7H Models Only: 2A Install Distributor Assembly .6 and Distributor Gasket
1989-90 C6D and C7D 1991 C5H, C6H and C7H Models Only: 3A Install Distributor Cap .5 Assembly and Rotor Assembly
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:
1990 C5H, C6H and C7H Models Only:
1. Install new distributor assembly P/N 1103920 and new distributor gasket P/N 10108445, per instructions on Page 6D4-5 of the 1990 TopKick/Kodiak Service Manual, X-9033.
2. Install "Campaign Identification Label."
1989-90 C6D and C7D, and 1991 C5H, C6H and C7H Models Only:
1. Install new distributor cap assembly P/N 10474757 and rotor assembly P/N 10496798, per instructions in the applicable Service Manual. Inspect for white powder in distributor assembly. If white powder blocks air vents, then replace entire distributor assembly.
2. Install "Campaign Identification Label."
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.
INSERT CAMPAIGN NUMBER
INSERT DEALER CODE
Dear General Motors Customer:
General Motors of Canada has determined that certain 1989-91 C6D, C7D, C5H, C6H and C7H Trucks with 6.0L (LSO) fuel-injected gas engines may have corrosion forming in the distributor cap. This corrosion can eventually result in an engine misfire, causing an engine failure.
To correct this condition, the existing distributor and/or cap will be replaced with new updated parts. This service will be completed for you at no charge.
Please contact your General Motors dealer to arrange a service date.
This letter identifies your vehicle. Presentation of this letter to your dealer will assist their Service personnel in completing the necessary correction to your vehicle in the shortest possible time.
Subsequent to contacting your dealer, further assistance, if required, may be obtained from our Customer Assistance Centre, toll free, by calling 1-800-263-3777 (English), or 1-800-263-7854 (French).
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.
