Do Not Swap Control Modules

On GM models with the Global A electrical architecture, a no start condition or another concern may appear after swapping an Engine Control Module (ECM) or other modules from one vehicle to another.


Current models using the Global A electrical architecture include:



• 2010-2015 LaCrosse

• 2011-2015 Regal

• 2012-2015 Verano

• 2013-2015 Encore



• 2010-2015 SRX

• 2013-2015 ATS, XTS

• 2014-2015 CTS Sedan, ELR

• 2015 Cadillac Escalade Models



• 2010-2015 Camaro, Equinox

• 2011-2015 Cruze

• 2012-2015 Sonic, Volt

• 2013-2015 Spark, Trax (Canada only), Malibu

• 2014 Silverado 1500, Spark BEV

• 2014-2015 Caprice PPV, Corvette, Impala, SS

• 2015 Colorado, Silverado, Suburban, Tahoe



• 2010-2015 Terrain

• 2014 Sierra 1500

• 2015 Canyon, Sierra, Yukon Models



The Global A electrical architecture associated with these vehicles does not allow controller swaps between vehicles. Swapping ECMs or other modules, including Radio, Body Control Module (BCM), Electronic Brake Control Module (EBCM), Sensing Diagnostic Module (SDM), Transmission Control Module (TCM), Electronic Climate Control (ECC) (HVAC), Electronic Power Steering (EPS), Hybrid Powertrain Control Module (HPCM), and the Instrument Panel Cluster (IPC), between two vehicles with the Global A electrical architecture will result in damaging both controllers.


TIP: A NO START CONDITION WILL OCCUR ON BOTH VEHICLES IF THESE MODULES ARE SWAPPED due to the new vehicle security code protocol (environment) implemented with the 2010 model year Global Diagnostic System (GDS) applications.


– Thanks to Ernest Haller




3 Responses to “Do Not Swap Control Modules”

  • Ed.:

    Thanks for your input. The list has been updated.

  • Mike:

    Shouldn’t the 2013 and newer Malibu be on this list?

  • Mike Allen:

    Just wanted to say Thank You for putting this in print!!! We (Technicians) have known this for years, but it’s a nice article to have to show the “Sales” Department when they come begging to swap radios.

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