Customer Satisfaction - AISIN ATF LEVEL GAUGE INCORRECT LENGTH

Certain 2005-2006 Chevrolet W4500/W5500 Crewcab, GMC W4500/W5500 Crewcab, and Isuzu NPR-HD/NQR Crewcab vehicles, equipped with a 4HK1T diesel engine and Aisin Automatic Transmission, have an automatic transmission fluid (ATF) level gauge with an incorrect length. If the fluid is checked/adjusted with this level gauge, it may result in an overfill condition. Under freeway driving and long uphill conditions, the ATF may overheat. If the vehicle is driven after the ATF Temperature light illuminates, internal damage to the transmission may result.

Dealers are to install a new ATF level gauge with the correct length.

Involved are certain 2005-2006 Chevrolet W4500/5500 Crewcab, GMC W4500/5500 Crewcab, and Isuzu NPR-HD/NQR Crewcab vehicles equipped with a 4HK1T diesel engine and Aisin Automatic Transmission built within these VIN breakpoints:

Important: Dealers should confirm vehicle eligibility through GMVIS (GM Vehicle Inquiry System) prior to beginning program repairs. [Not all vehicles within the above breakpoints may be involved.]

For US and Canada

For GM dealers with involved vehicles, a Campaign Initiation Detail Report (CIDR) containing the complete vehicle identification number, customer name and address data has been prepared and will be loaded to the GM DealerWorld (US) Recall Information, GMinfoNet (Canada) Recall Reports. Dealers/retailers will not have a report available if they have no involved vehicles currently assigned.

The Campaign Initiation Detail Report may contain customer names and addresses obtained from Motor Vehicle Registration Records. The use of such motor vehicle registration data for any purpose other than follow-up necessary to complete this program is a violation of law in several states/provinces/countries. Accordingly, you are urged to limit the use of this report to the follow-up necessary to complete this program.

For GM Models:

Parts required to complete this program are to be obtained from General Motors Service Parts Operations (GMSPO). Please refer to your "involved vehicles listing" before ordering requirements. Normal orders should be placed on a DRO = Daily Replenishment Order. In an emergency situation, parts should be ordered on a CSO = Customer Special Order.

For Isuzu Models:

Parts required to complete this program are to be obtained from American Isuzu Parts Distribution Network (AIPDN). Please refer to your "involved vehicles listing" prior to ordering.

Tools Required

General

1. Remove the old ATF level gauge (1) and discard.
2. Insert the new level gauge and check the fluid level according to Owner’s Manual in Section 5-11. Adjust fluid level if necessary.

Submit a Product Program Claim with the information indicated below.

Refer to the General Motors WINS Claim Processing Manual for details on Product Recall Claim Submission.

General Motors/Isuzu will notify customers of this program on their vehicle (see copy of customer letter included with this bulletin).

All unsold new vehicles in dealers' possession and subject to this program must be held and inspected/repaired per the above service procedure before customers take possession of these vehicles.

Dealers are to service all vehicles subject to this program at no charge to customers, regardless of mileage, age of vehicle, or ownership.

Customers who have recently purchased vehicles sold from your vehicle inventory, and for which there is no customer information indicated on the dealer listing, are to be contacted by the dealer. Arrangements are to be made to make the required correction according to the instructions contained in this bulletin. A copy of the customer letter is provided in this bulletin for your use in contacting customers. Program follow-up cards should not be used for this purpose, since the customer may not as yet have received the notification letter.

Dear General Motors/Isuzu Customer:

This notice is sent to inform you that we are conducting a customer satisfaction program that affects certain 2005 through 2006 model year Chevrolet and GMC W4500/W5500 Series Crewcab vehicles; and Isuzu NPR and NQR Crewcab vehicles, equipped with a 4HK1T diesel engine and Aisin Automatic Transmission.

We have learned that your vehicle may have been built with an incorrect automatic transmission fluid (ATF) level gauge. If the fluid is checked/adjusted with this level gauge, it may result in an overfill condition. During freeway driving and on long uphill climbs, the ATF may overheat. If the vehicle is driven after the ATF Temperature light illuminates, internal damage to the transmission may result.

To prevent this condition from occurring, your Chevrolet/GMC/Isuzu dealer will install a new ATF level gauge. This service will be performed for you at no charge .

To limit any possible inconvenience, we recommend that you contact your dealer as soon as possible to arrange a service date for this repair. By scheduling a service date, your dealer can ensure that the necessary part will be available.

The enclosed customer reply form identifies your vehicle. Presentation of this form to your dealer will assist in making the necessary correction in the shortest possible time. If you no longer own this vehicle, please let us know by completing the form and mailing it back to us.

If you have any questions or need any assistance, just contact your dealer or the Customer Assistance Center at 1-800-862-4389. The Customer Assistance Center’s hours of operation are from 8:00 AM to 11:00 PM, EST, Monday through Friday.

We sincerely regret any inconvenience or concern that this situation may cause you. We want you to know that we will do our best, throughout your ownership experience, to ensure that your commercial truck provides you many miles of enjoyable driving.

General Motors Isuzu Commercial Truck LLC

Enclosure

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