u/Bananaramajama420

Going on vacation soon, just wanted a good recommendation on what to leave the thermostat at when we leave.

There's no valid argument(s) supporting any actual differences. On a positive note, I love the game and the X-Games update.

A g

2019 GMC Sierra Denali - not a thing has been done to reset the TCM. No battery disconnect, no OBDII used, no fuses/relays unplugged/replugged, nothing.

Recently noticed it's not shifting the same as it always did, as if all of my shift points at similar speeds on the exact same roads I take daily are now different.

I have a premium extended warranty for another 12,000 miles. I'll go into a gear around 40-45mph and the RPM's will jump up with no dash lights/check engine lights coming on. The vehicle also jumps slightly forward when it happens but then it shifts back to where it was before the jump.

Bad transmission? I've complained to the dealer about it before and now it's getting worse. They said, "the warranty company won't cover it unless it throws a code." Do I just drive until it fails completely? What should I expect to happen exactly? TIA