Thanks Rygrego, and all,
ODB code came back with a failed transmission fluid cooler thermostatic valve.
One valve ($131) and three seals ($10) fixed my issue
& yes I replaced the fluid, filter and pan.
Display now reads between 149 - 182 for Transmission Fluid temp
Thanks for the help on this...
2018 GMC Yukon SLT
While taking a 1,000 mile trip to 9k elevation, my GMC Yukon alerted with a "transmission hot idle engine" message. I Let the vehicle cool for about 45 minutes, then resumed driving. The message alerted one more time, and I pulled over and let the vehicle cool for 20 minutes...
The little plastic piece that keeps the sun visor from bouncing around when in the closed position and in the plastic clip, fell-out/is missing.
I went to go replace it and thought this would be a 10 to 15 minuet project, guess not!
I have failed to get the old clip out of the liner.
I removed...
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