Information On Communication With ONSTAR Module After CANADIAN Cellular Upgrade (15-08-73-001A)
Publication date: 2021-12-16Reference number: 15-08-73-001A
Supersedes refnos: 15-08-73-001
INFORMATION ON COMMUNICATION WITH ONSTAR MODULE AFTER CANADIAN CELLULAR UPGRADE
TECHNICAL SERVICE BULLETIN
| Affected Model(s): | 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 2011-2013 GMC Savana 2010 HUMMER H2, H3 2010 Pontiac G3, G5, G6, Solstice, Vibe 2010 Saturn AURA, OUTLOOK, VUE Equipped with OnStar (RPO UE1) |
| Attention: | This Bulletin only applies to vehicles that have been involved in the Canadian OnStar cellular communication upgrade. Verify in the Investigate Vehicle History (IVH) if the upgrade has been completed before proceeding with this Bulletin. |
| Supercedes: | This Bulletin has been revised to remove Saab from Models section. Please discard 15-08-73-001. |
SERVICE INFORMATION
Starting in January of 2015, the OnStar cellular network available in Canada uses digital Global Systems for Mobile (GSM) technology. Older vehicles equipped with digital Code Division Multiple Access (CDMA) modules can be upgraded to the new GSM technology with dealer-installed equipment. Many of these older vehicles originally were diagnosed using the Tech2 scan tool. When performing scan tool communications on GSM-upgraded vehicles, the GDS2 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 Tech2. Failure to use the GDS2 to communicate with the Telematics Communication Interface Control Module (TCICM), or OnStar Module, may result in a incorrect diagnoses.
SERVICE INFORMATION
Digital GSM Capable Modules that only Communicate with GDS2 are Listed Below:
- Generation 9.4 - Class 2 Canada GSM Network Upgrade Module
- Generation 9.4 GMLAN (low speed) Canada GSM Network Upgrade Module
- Generation 10.0 GMLAN (high speed) Canada GSM Network Upgrade Module
SERVICE INFORMATION
Using GDS2 to Communicate with Digital-GSM Upgrade Modules (GDS2 Supported Vehicles):
The GDS2 scan tool attempts to identify vehicles by electronically reading and decoding the VIN. If the vehicle is already supported in the GDS2 scan tool, continue with standard vehicle and telematics (OnStar) diagnostics. No further action is required.
SERVICE INFORMATION
Using GDS2 to Communicate with Digital-GSM Upgrade Modules (Tech2 Supported Vehicles):
If the Tech2 does not communicate to other modules besides the Telematics Communication Interface Control Module (TCICM), or OnStar Module, refer to the Data Link References in SI.
Since GDS2 will not decode the VIN of a vehicle originally supported by the Tech2, a manual selection must be performed. To navigate to the specially-supported modules follow the instructions below.
SERVICE INFORMATION
Select the Additional Options.
Select the OnStar Canada GSM option.
Select the Module Diagnostics option.
Select the Telematics Communication Interface Control Module option.
The Generation of the Digital-GSM upgrade is then automatically determined. The GDS2 scan tool diagnostics data that follows is then appropriately configured for the generation of the upgraded module that is installed in the vehicle.