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1995 Corvette: Recall: Distributor Vacuum Vent Harness

Subject: Product Campaign: Distributor Vacuum Vent Harness
Model and Year: 1995 Chevrolet Corvette
Source: Chevrolet Dealer Campaign
Bulletin Number: 95-C-38

To: All Chevrolet/Geo Dealers

General Motors has decided that certain 1995 Chevrolet Corvettes equipped with 5.7L engines (RPO LT1 - VIN Code "P") were built with a distributor vacuum vent harness assembly which may come in contact with the power steering pulley. Contact with the pulley may cause the harness to wear through and could eventually result in a distributor failure.

To correct this condition, it is necessary to tie strap the harness to the throttle body coolant hose to prevent contact with the pulley.


Involved are certain 1995 Chevrolet Corvettes equipped with 5.7L engines and built within the following VIN breakpoints:

YEAR------MODEL------PLANT--------------PLANT CODE------FROM - THROUGH
1995------Y-Car------Bowling Green----------"5"---------S5112566 - S5114639

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 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 has no involved vehicles currently assigned.


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


All unsold new vehicles in dealers, possession and subject to this campaign must be held and inspected/repaired per the service procedure of this campaign bulletin before owners take possession of these vehicles.

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.

Owners of vehicles recently sold from your new vehicle inventory with no owner information indicated on the dealer listing, are to be contacted by the dealer, and arrangements made to make the required correction according to the instructions contained in this bulletin. This could be done by mailing to such owners a copy of the owners letter accompanying this bulletin. Campaign follow-up cards should not be used for this purpose, since the owner may not as yet have received the notification letter.

In summary, whenever a vehicle subject to this campaign enters your vehicle inventory, or is in your dealership for service in the future, please take the steps necessary to be sure the campaign correction has been made before selling or releasing the vehicle.


Parts required to complete this campaign are to be obtained from General Motors Service Parts Operations (GMSPO). To ensure these parts will be obtained as soon as possible, they should be ordered from GMSPO on a "C.I.O." order with no special instruction code, but on an advise code (2) All Goodwrench parts system test dealers should order on a "VIP" order.

Quantity/Part Number Description Vehicle

1/12337820 Tie Strap


1. Inspect the distributor vacuum vent harness assembly for the part number identification label. The identification label is located on the clean air supply hose of the harness where it is attached to the air intake duct via a plastic elbow connector.


Care should be taken as coolant hoses and engine components in this area may be hot.

0 If the identification label is marked with part number 12553223, no further action is required. Proceed to step 4. (The distributor vacuum vent harness assembly part number 12553223 may also be identified by the "filtered restrictor, which is blue on one side and white on the other side. The filtered restrictor is the larger diameter of the two plastic valves, and is located furthest from the intake manifold).

0 If the identification label is marked with part number 12554393 (both sides of the filtered restrictor should be blue), proceed to step 2.

NOTICE: On both harness assemblies, the plastic valve closest to the intake manifold, the "check valve", will be blue on one side and white on the other side.

2. Attach tie strap part number 12337820 to restrain the vacuum supply hose to the throttle body coolant line. (See Figure 1 below).

Care must be taken to assure the hose does not come in contact with the power steering pump pulley, or is kinked at any location.

3. Cut off any excess material from the tie strap.

4. Install Campaign Identification Label.


Each vehicle corrected 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 campaign number and the five (5) digit dealer code of the dealer performing the campaign service. This information may be inserted with a typewriter or a ball point 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. Additional "Campaign Identification Labels" can be obtained from DAC.

Apply "Campaign Identification Label", only on a clean, dry surface.


Submit a Product Campaign Claim with the information indicated below:

* FAILED PARTS LABOR LABOR OTHER REPAIR PERFORMED PC PART NO. ALLOW CC-FC OP HOURS HOURS ----------------------------------------------------------------------- Inspect and install 1 12337820 ** SK-00 V9635 0.2 0.1 tie strap if necessary

* Campaign Administrative Allowance.

** The "Parts Allowance" should be the sum total of the current GMSPO Dealer Net price plus 40% of all parts required for the repair.

Refer to the Chevrolet Claims Processing Manual for details on Product Campaign Claim Submission.

Dear Chevrolet Customer:

This notice is sent to inform you that Chevrolet Motor Division is conducting a recall campaign that includes your vehicle.


General Motors has decided that certain 1995 Chevrolet Corvettes were shipped with a distributor vacuum vent harness assembly that may contact the power steering pump pulley. If the pulley rubs against the harness, it may cause the harness to wear through and could eventually lead to a distributor failure.


To prevent this condition from occurring, your dealer will inspect and repair the harness assembly, if necessary, to assure that the harness will not come in contact with the pulley. This service will be performed for you at no charge.


Please contact your Chevrolet dealer as soon as possible to arrange a service date and so the dealer may order the necessary parts for the repair. Instructions for performing this service have been sent to your dealer and parts are available. Please contact your dealer to arrange a service date as soon as possible. You may ask your dealer if you wish to know how much time will be needed to schedule and process your vehicle.

The enclosed owner reply card identifies your vehicle. Presentation of this card to your dealer will assist in making the necessary correction in the shortest possible time. If you have sold or traded your vehicle, please let us know by completing the postage paid 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.


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