The E90 controller modification service will allow you to use the aftermarket tuning suite of your choice to modify your E90 equipped 2019-21 GMC Sierra and Chevrolet Silverado with the 5.3L L84 and 6.2L L87 engines.
This is a service performed on your original ECM with a 1-2 business day turnaround.
You will receive your original ECM back!
You will not have to perform an immobilizer relearn or any other relearn operations before you reinstall the ECM in your vehicle.
The ECM operating system and calibrations are not modified in any way from OEM stock, and retain the original OEM CVN's.