Product Safety - ABS Operation

General Motors has decided that a defect, which relates to motor vehicle safety, exists in certain 2008 HUMMER H2 vehicles. Certain wires in the ABS wheel speed sensor wiring harness may be reversed. This condition could result in increased stopping distance under certain circumstances. If vehicle stopping distance is increased, a crash could occur.

Depending on the VIN, dealers are to correct the ABS wheel speed sensor wiring if required, reprogram the brake control module, or both.

Involved vehicles, and their required repairs, are listed below.

Important: Dealers are to confirm vehicle eligibility prior to beginning repairs by using the GM Vehicle Inquiry System (GMVIS).

For dealers/ with involved vehicles, a listing with involved vehicles containing the complete vehicle identification number, customer name, and address information has been prepared and will be provided through the applicable system listed below. Dealers will not have a report available if they have no involved vehicles currently assigned.

-- US dealers - GM DealerWorld Recall Information

-- Canadian dealers - GMinfoNet Recall Reports

The listing 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 recall 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 recall.

No parts are required for this recall.

Important: See the Vehicles Involved section of this bulletin to determine the service required for each individual vehicle.

Wire Repair (use only if applicable - refer to the Vehicles Involved section of this bulletin)

1. Hook up the Tech 2 to the vehicle.

1.1.	Capture the DTCs, if required.

1.2.	Clear the DTCs, if required.

1.3.	Ensure that there are no DTCs present before proceeding to Step 2.

2. Lift and support the vehicle. Refer to Lifting and Jacking the Vehicle in SI.





3. Disconnect the left front and left rear wheel speed sensor wires. The front wheel speed sensor wire can be disconnected at the connection near the upper control arm pivot point on the frame (1). The left rear wheel speed sensor wire can be disconnected at the wheel speed sensor on the end of the axle housing near the wheel (2).
4. Using the Tech 2, determine if the DTC set corresponds to the wheel speed sensor that was disconnected.

•	If the DTC set corresponds to the sensor disconnected, proceed to Step 11.

•	If the DTC set does NOT correspond to the sensor disconnected, then the left and right wheel speed sensor wires are cross-wired. Lower the vehicle. Refer to the EBCM Wiring Schematic and Step 5.








5. Locate the electronic brake control module connector (EBCM).



6. Press the release tab and remove the under hood fuse block cover.



7. Press and hold the release tab while lifting to remove the connector from the EBCM, and fully open the connector to access the wires.



8. Remove the white dress cover from the connector.
9. Refer to the EBCM Wiring Schematic to locate the correct connector cavities and terminal wire colors for the cross-wired wheel speed sensors. Note: Wires into cavities 6 and 37 may be switched (front wheels) or wires into cavities 4 and 35 may be switched (rear wheels).





10. Remove one of the cross-wired terminal wires from its connector cavity and install this terminal wire in the correct location of the connector. Do likewise with the other cross-wired terminal wire. The two wires should now be located in each other's original pin locations in the connector.
11. Connect the wheel speed sensors and clear the DTCs. Ensure that there are no DTCs set.
12. Lower the vehicle.

Reprogram Procedure - (use only if applicable - see the Vehicles Involved section of this bulletin)

Tech 2 Legacy or J2534 Pass-Thru Programming Method for the EBCM

Important: : If Tech 2 Legacy or J2534 Pass-Thru programming fails, call Techline Customer Support Center (TCSC) at 1-800-828-6860 (English) or 1-800-503-3222 (French). A "Candi" module is necessary.

Calibration Information

Do not attempt to order the calibration number from GMSPO. The calibration numbers required for this service procedure are programmed into control modules via a Techline Tech 2® scan tool and TIS 2 Web with the calibration update. Use TIS 2 Web version 9.0 for 2007 (available on 09/03/07). If you cannot access the calibration, call the Techline Customer Support Center at 1-800-828-6860 (English) or 1-800-503-3222 (French) and it will be provided.

Notice: Before reprogramming, please check the battery condition to prevent a reprogramming error of any of the modules due to battery discharge. Battery voltage must be between 12 and 16 volts during reprogramming. If the vehicle battery is not fully charged, use jumper cables from an additional battery. Be sure to turn off or disable any system that may put a load on the battery, such as automatic headlamps, daytime running lights, interior lights, heating, ventilation, and air conditioning (HVAC) system, radio, engine cooling fan, etc. A programming failure or control module damage may occur if battery voltage guidelines are not observed.

The ignition switch must be in the proper position. The Service Programming System (SPS) application prompts you to turn ON the ignition, with the engine OFF. DO NOT change the position of the ignition switch during the programming procedure, unless instructed to do so.

Make certain all tool connections are secure, including the following components and circuits:

DO NOT disturb the tool harnesses while programming. If an interruption occurs during the programming procedure, programming failure or control module damage may occur.

DO NOT turn OFF the ignition if the programming procedure is interrupted or unsuccessful. Ensure that all control module and DLC connections are secure and the TIS terminal operating software is up to date.

1. Verify that there is a battery charge of 12 to 16 volts. The battery must be able to maintain a charge during programming. Use an additional jump battery if necessary. Only use approved Midtronics charger or Jumper Packs, etc. to maintain proper battery voltage during programming.
2. Reprogram the electronic brake control module (EBCM). Refer to SI and Service Programming System (SPS) documentation for EBCM programming instructions, if required.

The General Motors Courtesy Transportation Program is intended to minimize customer inconvenience when a vehicle requires a repair that is covered by the New Vehicle Limited Warranty. The availability of courtesy transportation to customers whose vehicles are within the warranty coverage period and involved in a product recall is very important in maintaining customer satisfaction. Dealers are to ensure that these customers understand that shuttle service or some other form of courtesy transportation is available and will be provided at no charge. Dealers should refer to the General Motors Service Policies and Procedures Manual for courtesy transportation guidelines.

Submit a Product Recall Claim with the information indicated below:

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

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

The US National Traffic and Motor Vehicle Safety Act provides that each vehicle that is subject to a recall of this type must be adequately repaired within a reasonable time after the customer has tendered it for repair. A failure to repair within sixty days after tender of a vehicle is prima facie evidence of failure to repair within a reasonable time. If the condition is not adequately repaired within a reasonable time, the customer may be entitled to an identical or reasonably equivalent vehicle at no charge or to a refund of the purchase price less a reasonable allowance for depreciation. To avoid having to provide these burdensome remedies, every effort must be made to promptly schedule an appointment with each customer and to repair their vehicle as soon as possible. In the recall notification letters, customers are told how to contact the US National Highway Traffic Safety Administration if the recall is not completed within a reasonable time.

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

Dealers are to service all vehicles subject to this recall 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. A copy of the customer letter is provided in this bulletin for your use in contacting customers. Recall 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 recall enters your vehicle inventory, or is in your dealership for service in the future, you must take the steps necessary to be sure the recall correction has been made before selling or releasing the vehicle.

Dear General Motors Customer:

This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act.

General Motors has decided that a defect that relates to motor vehicle safety exists in certain 2008 HUMMER H2 vehicles. As a result, GM is conducting a safety recall. We apologize for this inconvenience. However, we are concerned about your safety and continued satisfaction with our products.

Important: 

Why is your vehicle being recalled?

Certain wires in the ABS wheel speed sensor wiring harness may be reversed. This condition could result in increased stopping distance under certain circumstances. If vehicle stopping distance is increased, a crash could occur.

What will we do?

Your GM dealer will correct the ABS wheel speed sensor wiring, if required, and in some cases, reprogram the brake control module. This service will be performed for you at no charge. Because of service scheduling requirements, it is likely that your dealer will need your vehicle longer than the actual service correction time of approximately 20 minutes to 1 hour and 15 minutes, depending on the service required.

If your vehicle is within the New Vehicle Limited Warranty your dealer may provide you with shuttle service or some other form of courtesy transportation while your vehicle is at the dealership for this repair. Please refer to your Owner’s Manual and your dealer for details on courtesy transportation.

What should you do?

You should contact your GM dealer to arrange a service appointment as soon as possible. Bring the enclosed customer reply form with you when you visit your dealer. The form identifies the repairs required. If you no longer own this vehicle, please let us know by completing the form and mailing it back to us.

Do you have questions?

If you have questions or concerns that your dealer is unable to resolve, please contact the appropriate Customer Assistance Center at the number listed below. More information about this recall can be found at the Owner Center at MyGMLink, http://www.gm.com/recall

If after contacting your dealer and the Customer Assistance Center, you are still not satisfied we have done our best to remedy this condition without charge and within a reasonable time, you may wish to write the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue, SE, Washington DC 20590, or call the toll-free Vehicle Safety Hotline at 1.888.327.4236 (TTY 1.800.424.9153), or go to http://www.safercar.gov.

Federal regulation requires that any vehicle lessor receiving this recall notice must forward a copy of this notice to the lessee within ten days.

Scott Lawson

General Director,

Customer and Relationship Services

Enclosure

07221