Thanks for the responses guys. The service guy at the dealership has actually been pretty good to deal with. I expressed my concerns with the issue on the last oil change around January, and had to pay the diagnostic fee. This is where they stated no issues first, he said bring it back when you get a more dialed diagnostic. We ended up having another kid at the end of the month, so didnt end up driving a bunch. Fast forward to March 28th, brought it in to the dealership, took the shop foreman/transmission specialist for a drive so i could show them the issues (wasnt accepting another "could not replicate" diagnostic). Warranty ended March 31st, so got the work order in for the 28th, before warranty expired.
This is the issue that facing me now, powertrain warranty is expired now however they will keep the Work order open for another week to see if anything changes or gets worse, but pretty much eluded to the fact that everything from the dataside was looking good.
My thoughts to go forward are:
Return and ask them to clear the transmission data, re-run the diagnostics but get a copy of the data and shift points, etc and start heading it up with GM canada to see if that gets anywhere. Im not sure if i can transfer the WorkOrder over to another dealership since the warranty is now expired. but at least with the data and the work order i can try push GM harder or maybe the dealership will cave and take a more extensive look.
Bringing it to a non-dealer shop or transmission shop and trying to get reimbursed would be the last step, but im doubtful that route would be successful.
"Speed has never killed anyone, suddenly becoming stationary… That’s what gets you."