And today GM called me (?!) asking for an update, because they apparently have no clue what is going on and were not aware I’ve had the truck back since beginning of last week. Sent from my iPhone using Tapatalk
We’ll never know what the issue is, as they ended up replacing the whole transmission. Thus far it seems to be fine judging by the much lower temperatures (and much slower climbing) driving around town. Will hook up the boat soon and see what happens. Sent from my iPhone using Tapatalk
Yea I have an escalated case open with Customer Care now as this has become a bigger issue since at this point I have a 2018 truck that I’ve been without for about 20 days. Sent from my iPhone using Tapatalk
Thanks for the info. Unfortunately, at this point, I’ve had the truck at the dealership three times and it currently is still sitting there with the transmission taken apart waiting on parts yet again. I have no idea if they have checked the items y’all are referring to but I will ask.
Do you have any pictures or diagrams by chance? The dealer still hasn’t fixed this and actually have somehow made it worse (now transmission overheats in town when not pulling anything). edit - the strange thing is it went over 250 but the alarm didn’t go off this time
Could it still be the thermostat if it doesn’t do it when not pulling the boat? We ended up unhooking the trailer (and swapping trucks) and my truck drove home without the boat in the 195 degree range.
So I just got a new boat (only 17ft fiberglass) and was on the way to put it in the water for the first time and my 2018 GMC Z71 with 10k miles apparently can’t handle that, as within about 15 miles on the interstate I get a warning saying my transmission is overheating and I need to pull over and idle. After a couple of minutes I was finally able to navigate through the control panel it said the trans temp was 258 degrees. I was driving in tow mode. After it cooled down to 210 degrees I tried again without tow mode and it was back to 241 degrees before I got to the next exit about 2 miles away. Needless to say I’m pissed off.
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