New member here - just signed up to track this issue.
I have a 2022 Sierra with the 6.2. VIN search on GM recall website shows the recall.
I called my dealer today, VAN GMC in Scottsdale, AZ, and my service guy said their instructions were to do nothing at this time. Apparently regardless of the fact that they are supposed to implementing some kind of test. So that's at least a sample size of 1 saying the dealers don't know what to do with respect to this latest bulletin.
So far I've had zero problems with my truck in 46,000 miles. Love the vehicle. Not really sure what to think about all this. I take road trips to CO, NV, and CA a fair amount (daughter is starting college in CA this fall). Not thrilled about the idea of the motor going out in the middle of nowhere.
Staying tuned...