Manufacturer communication — 2006 GMC YUKON DENALI XL

• The model list covers 2000-2009 GM passenger cars and light duty trucks, and by name 2010-2013 GMC Acadia, Sierra models and Yukon models.

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  2000-2009 GM Passenger Cars and Light Duty Trucks 2010-2011 Buick Lucerne 2010-2013 Buick Enclave 2010-2011 Cadillac DTS, STS 2010-2013 Cadillac CTS, Escalade Models 2010 Chevrolet Cobalt 2010-2011 Chevrolet Aveo, Malibu 2010-2012 Chevrolet Colorado 2010-2013 Chevrolet Avalanche, Corvette, Express, Impala, Silverado, Suburban, Tahoe, Traverse 2010-2012 GMC Canyon 2010-2013 GMC Acadia, Sierra Models, Yukon Models

• It applies only to vehicles that have had the Canadian OnStar cellular communication upgrade.

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  This Bulletin only applies to vehicles that have been involved in the Canadian OnStar® cellular communication upgrade.

Steps to confirm (in the document’s order)

• Verify in the Investigate Vehicle History (IVH) whether the upgrade has been completed before proceeding.

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  Verify in the Investigate Vehicle History (IVH) if the upgrade has been completed before proceeding with this Bulletin.

Repair

1. On GSM-upgraded vehicles the GDS 2 scan tool must be used to communicate with the Telematics Communication Interface Control Module (TCICM), i.e. the OnStar module.

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   When performing scan tool communications on GSM-upgraded vehicles, the GDS 2 scan must be used for the Telematics Communication Interface Control Module (TCICM), or OnStar® Module.

2. Because GDS 2 will not decode the VIN of a vehicle originally supported by the Tech 2, the vehicle must be selected manually.

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   Since GDS 2 will not decode the VIN of a vehicle originally supported by the Tech 2, a manual selection must be performed.

3. In the manual selection, choose the OnStar Canada GSM option.

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   Select the OnStar Canada GSM option.

Caution

• Communication with all the other modules on these vehicles is still done with the Tech 2.

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  All scan tool communications with other modules on these vehicles continue to be performed using the Tech 2.