Manufacturer communication — 2006 GMC YUKON DENALI XL

• The model list names GMC Yukon models from model year 2003 to 2014.

  the passage

  Yukon Models 2003 2014

• Customers may comment on a notification and/or that some 2G OnStar module features are no longer operable.

  the passage

  Some customers may comment on a notification and/or some 2G OnStar module features are no longer operable.

• The concerns may include an OnStar button malfunction and being unable to contact the OnStar call center.

  the passage

  • OnStar Button Malfunction • Unable to Contact OnStar Call Center

Possible causes

• On December 31, 2022 the 2G cellular signal will no longer be active, causing some OnStar module features to be inoperable.

  the passage

  On December 31, 2022, the 2G cellular signal will no longer be active, causing some OnStar module features to be inoperable.

Steps to confirm (in the document’s order)

• Any other function in the Telematics Communication Interface Control Module (other than OnStar) is to be diagnosed as directed by SI.

  the passage

  Any other function in the Telematics Communication Interface Control Module (other than OnStar), technicians are directed to diagnose as directed by SI.

Repair

• Direct a customer with a concern covered by this bulletin to the OnStar Guardian app.

  the passage

  If a customer comes in for a concern that pertains to this bulletin, please direct them to the OnStar Guardian app.

Caution

• Do not replace the OnStar module because of the 2G shutdown.

  the passage

  Do Not replace the OnStar module because of 2G shutdown.

• If the vehicle is brought in for inactive, broken or inoperable OnStar features, do not replace the module; the module is not broken.

  the passage

  If a vehicle did not respond to, or the customer did not receive notification of the OnStar deactivation, and is brought into service for inactive/broken/inoperable OnStar features, do not replace the module. The module is not broken.