RubiconJoey

Would you do $40 shipped for them?

Willing to sell the "wood" trim piece from the drivers door panel?

I just purchased a 2017 Sierra and was wondering if anyone here could help me get detailed service records. I know the dealer I bought it from done some trans and engine work. I want to know the exact details of what was done, what parts were replaced, what updates were done, etc. TIA

This is likely what you're experiencing. I hauled an enclosed trailer from KY to VA and noticed exactly this as I was monitoring the trans temps. When I was driving on the interstate, temps would be fine. As soon as I got off an exit to get gas/food, the temps would start to rise. On short fuel stops, the temperature would actually be higher after I restarted the truck to leave. This is because the fluid where the sensor is located, was absorbing the heat from the trans. Temps never got too hot but, it was interesting to watch them rise and fall with vehicle speed and the fan kicking on and off. What was really wild was watching how quickly they dropped when it started raining.

The sensors are only monitored when in reverse, you would need to figure out how to program the system to monitor them while in drive. Once you tackled that you would then want to make sure they weren't going off for every vehicle or road sign on the highway.

My 2011 did this when my battery went dead along with some other weird stuff that I thought was caused by a battery drain issue. Replaced the battery and all was well. I'm not sure that your issue is the same but, I would bet it's something electrical and not mechanical like running out of freon.

I just picked up a 2011 Sierra Denali as well (March 5th). Had a little over 69K on it when I got it. I came from a Yukon with the 5.3 and I was really surprised by how much more power the 6.2 has. I'm pushing 75K now and I love the truck but, it's not been a perfect love story. After less than a month of owning it, I started noticing a ticking noise so I took it in to have it checked out before my power train warranty ran out (August of this year for me, should be sometime this year for you too). Long story short they replaced the lifters, rings and pistons. They also replaced the oil cooler lines and an o2 sensor but, I don't think those were related to the noise even though they were still warrantied. I've also had some door handle issues but, I wont side track the thread with those. Anyway...here's the only clean pic of the truck I've got (black is soo hard to keep clean). It was raining when I picked up and was nasty by the time I got back home so the first place I stopped was the car wash and this was taken directly after.