Customer Satisfaction Program - Incorrect Axle Pinion Angle

General Motors has decided that certain 2003 Chevrolet and GMC C4500 medium duty trucks equipped with an 11,000# rear axle (GL4) may have been built with an incorrect axle pinion angle that results in undesirable drive characteristics such as launch shudder and highway speed driveline vibration.

Dealers are to install new spring seats on vehicles. This Customer Satisfaction Program must be performed at the same time as recall 02028. Refer to Recall Bulletin 02028 for information.

Involved are certain 2003 Chevrolet and GMC C4500 medium duty trucks equipped with an 11,000# rear axle (GL4) and built within these VIN breakpoints:

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

Involved vehicles have been identified by Vehicle Identification Number. Computer listings containing the complete Vehicle Identification Number, customer name and address data have been prepared, and are being furnished to involved dealers with the program bulletin. The customer name and address data furnished will enable dealers to follow up with customers involved in this program. Any dealer not receiving a computer listing with the program bulletin has no involved vehicles currently assigned.

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

Refer to Recall Bulletin 02028 for parts information.

All vehicles involved in this Customer Satisfaction Program are also included in Safety Recall 02028. This Customer Satisfaction Program and the recall are to be performed at the same time. Refer to Recall Bulletin 02028 for service procedure.

For US

Place an Identification Label on each vehicle corrected in accordance with the instructions outlined in this Product Program Bulletin. Each label provides a space to include the program number and the five (5) digit dealer code of the dealer performing the program service. This information may be inserted with a typewriter or a ball point pen.

Put the Identification Label on a clean and dry surface of the radiator core support in an area that will be visible to people servicing the vehicle. When installing the Identification Label, be sure to pull the tab to allow the adhesion of the clear protective covering. Additional Identification Labels for US dealers can be obtained from Dealer Support Materials by either ordering on the web from DWD Store, gm-dealerworld.com, or calling 1-866-700-0001 (Monday-Friday, 8:00 am to 5:00 pm EST). Request Item Number S-1015 when ordering.

For Canada

Place an Identification Label on each vehicle corrected in accordance with the instructions outlined in this Product Program Bulletin. Each label provides a space to include the program number and the five (5) digit dealer code of the dealer performing the program service. This information may be inserted with a typewriter or a ball point pen.

Put the Identification Label on a clean and dry surface of the radiator core support in an area that will be visible to people servicing the vehicle. Additional Program Identification Labels for Canadian dealers can be obtained from DGN by calling 1-800-668-5539 (Monday-Friday, 8:00 am to 5:00 pm EST). Ask for Item Number GMP91 when ordering.

Refer to Recall Bulletin 02028 for claim submission information.

Customers will be notified of this program on their vehicles by General Motors (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 service procedure of this program bulletin 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, from this time forward.

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. This could be done by mailing to such customers a copy of the customer letter accompanying this bulletin. Program follow-up cards should not be used for this purpose, since the customer may not as yet have received the notification letter.

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

Dear General Motors Customer:

General Motors has decided that certain 2003 Chevrolet and GMC C4500 medium duty trucks equipped with an 11,000 pound rear axle may have been built with an incorrect axle pinion angle that results in undesirable drive characteristics such as launch shudder and highway speed driveline vibration.

Your GM dealer will install new spring seats on your vehicle. This service will be performed for you at no charge .

The length of time required to perform this service correction, along with the anchor plate fracture recall, is approximately fifty-five minutes. Additional time may be required to schedule and process your vehicle. if your dealer has a large number of vehicles awaiting service, this additional time may be significant. Please ask your dealer if you wish to know how much additional time will be needed to schedule, process and repair your vehicle.

Please contact your dealer as soon as possible to arrange a service date. Parts are available and instructions for making this correction have been sent to your dealer. Your dealer is best equipped to obtain parts and provide services to correct your vehicle as promptly as possible. Should your dealer be unable to schedule a service date within a reasonable time, you should contact the appropriate Customer Assistance Center at the listed number below:

The attached customer 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 no longer own this vehicle, please let us know by completing the attached and mailing it in the postage paid envelope.

We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your safety and continued satisfaction with our products.

General Motors Isuzu Commercial Truck