The 2022 New MPM ecu chip tuning tool has all GM protocols for Buick Cadillac Chevrolet Chrysler Dongle Ford Hummer Jeep Opel Saab ECM and TCM OBD reading, no need damaos for GM cars.
Here is demo example on Caddilac E67 ecu remap with MPM tuning tool and godiag gt105 breakout box and tricore cable.
Caddilac E67 Gen4 ECU Remap
Connect gt105 with ecu via tricore cable
Once you press on the godiag ignition emulator, CAN-H CAN-L indicators will flash, which indicates communication is good
You need to provide a power supply 12V 5amp to ecu
Connect MPM ecu tuning tool with laptop via USB cable
Once establish ECU connection, launch the VCM Editor program
Select E67 GM Gen4- Read Entire- Read
Reading data in the process
Retrieve VIN successfully
Save data once read completed.
Then do the function you desired.
Don’t need any WinOLS, pcmtuner manage it (if you have it), you can direct edit what you want, like speed, injection, spark angle etc.