GM went to a Global B architecture on the 22+ refresh trucks and the Pulsar won't work with them. It will only work on the 2019-2022 pre refresh trucks which were Global A architecture.
HP Tuners has just announced support for the Chevrolet Silverado and GMC Sierra 1500 with GM Global B encrypted E90 ECM V8 engines.
www.musclecarsandtrucks.com
Posted this in another thread regarding tunes. Think it’s a ship off ecu type of deal but might be interesting to some. Not my cup of tea as far as verified info so take from it what you will.
When I talked to someone about HP Tuners a year ago, they were swapping a chip in the ECM for a non encrypted one to be able to tune them. I don't know if the encryption has actually been cracked yet.