SPECIAL POLICY: COLD IDLE SPEED REDUCTION

Model and Year: 1985 ASTRO VAN WITH 4.3L ENGINE AND AUTOMATIC TRANSMISSION

Some customers may experience a condition immediately after cold vehicle startup where, by applying the brake pedal, they are unable to completely stop the rear wheels from turning on icy surfaces.

Variables such as rear axle ratios and higher engine RPM while the vehicle is in the cold idle mode can result in increased torque to the rear wheels. These variables, in conjunction with a lightly loaded rear axle, can increase the pedal effort required to stop the rear wheels from spinning on ice when the vehicle is placed in gear. This condition can be effectively addressed by using the service procedure to reduce the cold idle speed of the engine.

Vehicles Involved

Involved are all 1985 Astro Vans with 4.3L engine and automatic transmission built within the following VIN breakpoints:

PLANT FROM THROUGH ----- ---- ------- Baltimore FB100006 FBI90098

Special Policy Adjustment

Should this condition occur, Chevrolet will repair involved vehicles at no charge for a period of five (5) years, regardless of mileage, from the date the vehicle was originally placed in service.

This "SPECIAL POLICY ADJUSTMENT BULLETIN" should be filed in the three-ring binder previously furnished to each dealer by General Motors.

Owner Notification

Owners of vehicles involved in this Special Policy Adjustment will be notified by Chevrolet Motor Division, (see copy of owner letter included with this bulletin).

Service Procedure - 1985 Model with 4.3L Carbureted Engine

Reduce cold idle speed to 1600 RPM as follows:

1. Remove dash extension.

2. Remove engine cover.

3. Attach tachometer. The tachometer (tach) terminal is next to the engine control switch (bat) connector on the distributor cap (reference Figure No. 1).

NOTICE: The tachometer terminal must never be allowed to touch ground because damage to the module inside the distributor and/or ignition coil can result.

4. Reduce cold idle speed to 1600 RPM by adjusting the fast idle screw. Refer to tune up label for procedure.

5. Remove tachometer and reinstall engine cover and dash extension.

6. On a clean, dry surface, next to the existing tune up label located on the fan shroud, place label P/N 10066488.

Parts Information

Labels to show fast idle speed specification change will be shipped directly to involved dealers. If additional labels are required, contact your Branch office.

Quantity/ Part Number Description Vehicle ----------- ----------- ------- 10066488 Label 1

THIS LABEL IS NOT TO BE ORDERED FROM GENERAL MOTORS SERVICE PARTS OPERATIONS (GMSPO).

Warranty Information

Submit a warranty claim for credit with the information indicated below:

*** LABOR LAB NET REPAIR PERFORMED PC PART NO. PARTS FC OP HRS AMT ---------------------------------------------------------------- Reduce Cold Idle 00 T7395 .6 $0.30 Speed and Install Label

*** The $0.30 identified in the "Net Amount" column represents 30% of parts cost when parts are furnished no-charge by Chevrolet.

Dealers will automatically receive the correct labor and material allowance based on the labor operation performed.

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

Reimbursement

Claims for customer reimbursement of previously paid repairs are eligible for reimbursement of repair expenses due to a previous cold idle speed reduction.

To obtain reimbursement, eligible owners must submit claims to an authorized Chevrolet dealer. The reimbursement should not exceed the amount which would be paid by chevrolet for the applicable labor operation.

When a customer requests reimbursement, the following must accompany that request: - Proof of ownership, and - original paid receipt, or - A copy of receipt with proof of payment.

Claims for customer reimbursement on previously paid repairs are to be submitted according to the form and instructions included with this bulletin. Additional forms are to be reproduced locally.

INSTRUCTIONS

1. R.O. NUMBER & DATE: The dealership should enter the R.O. Number and Date of the owner's or dealer's paid receipt or invoice.

2. REQUEST DATE (MONTH, DAY): Date owner or dealer requested reimbursement.

3. VEHICLE IDENTIFICATION NUMBER: VIN involved.

4. MILEAGE: Enter mileage at time of transaction. (If not available, enter "0". )

5. FC Code is preprinted on form.

6. LABOR OPERATION NO. - Use T7425.

7. & 8. SUBLET DMN & LINE TOTAL: Enter total amount of reimbursement. (Do not enter parts or labor hours on claim.)

9. AUTH CODE: If the amount of reimbursement approved is $40* or less, no authorization is needed. If the amount exceeds $40*, contact Chevrolet Representative for GSD-740 authorization.

10. REQUESTED REIMBURSEMENT: Dealer Service Manager enter amounts determined from owner supplied invoices or paid receipts, which are covered.

11. APPROVED AMOUNT & 740 STAMP: Dealer Service Manager to determine based on reimbursement policy of this bulletin. If the total amount exceeds $40*, contact Chevrolet Representative for GSD-740 authorization.

12. See Item 11 to determine need for GSD-740 authorization.

13. DEALER REFERENCE INFORMATION:

A. Enter Document Number and Line Number on which claim was submitted. B. Enter Claim Memo Number and Date when claim is credited. C. Enter Number of Dealer Check to Owner, if applicable. Date Check was written, if applicable. Date copy of Check was attached to OWNER REQUEST FOR REIMBURSEMENT file.

14. OWNER INFORMATION (must include telephone number).

15. DEALER INFORMATION & SERVICE MANAGER SIGNATURE: To be completed by Service Manager.

16. EXPLAIN: Should the Dealer Service Manager determine, after review of owner's invoices/receipts, that the reimbursement case is not eligible; Service Manager should write reason on worksheet, explain to owner, and place a copy of the worksheet in the file.

If the amount approved by the Chevrolet Representative is different from the amount determined by the dealer, the Chevrolet Representative will provide a reason as an explanation to the owner.

17. The Dealer is then to issue the owner a check for reimbursement in the approved amount. A copy of the check issued to the owner is to be attached to the Dealer's file copy of the request within 30 days after Dealer credit is received and retained for 24 months from date of credit.

* NOTE: Calculated reimbursement should not exceed warranty labor time guide (.6) x prevailing labor rate.

September, 1987

(Notification used by Chevrolet Motor Division)

Dear Chevrolet Owner:

This letter has been sent to inform you of the following special policy that applies to your vehicle.

REASON FOR THIS SPECIAL POLICY

Some owners of 1985 Chevrolet Astro Vans equipped with 4.3L V-6 engines and automatic transmissions may experience a condition immediately after cold vehicle startup where, by applying the brake pedal, they are unable to completely stop the rear wheels from turning on icy surfaces.

Variables such as rear axle ratios and higher engine RPM while the vehicle is in the cold idle mode can result in increased torque to the rear wheels. These variables, in conjunction with a lightly loaded rear axle, can increase the pedal effort required to stop the rear wheels from spinning on ice when the vehicle is placed in gear. This condition can be effectively addressed by reducing the cold idle speed of the engine.

WHAT YOU SHOULD DO

In the event your Astro Van encounters this condition as outlined above, contact your Chevrolet dealer. Instructions have been furnished to Chevrolet dealers for repairing this condition and handling of this special policy.

If you have previously encountered this condition and paid for all or part of the repair, you should contact your Chevrolet dealer who will advise you regarding reimbursement. It will be necessary to present paid receipts or invoices to verify any expenditures for such repairs, so you should have them available when you contact your dealer.

We suggest you retain this letter with your Owner's Manual, Maintenance Guide and Warranty Folder.

Chevrolet Motor Division is taking 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.