Manufacturer communication — 2006 GMC YUKON DENALI XL

• The model list addresses 2000-2009 GM passenger cars and light duty trucks.

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  2000-2009 GM Passenger Cars and Light Duty Trucks

• The bulletin only applies to vehicles that have been involved in 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. Because GDS 2 will not decode the VIN of a vehicle originally supported by the Tech 2, a manual selection must be performed.

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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.

2. Select Additional Options, then select the OnStar Canada GSM option.

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   Select the Additional Options. Select the OnStar Canada GSM option.

Caution

• On GSM-upgraded vehicles, the GDS 2 must be used for scan tool communication with the Telematics Communication Interface Control Module (TCICM), or 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.

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