I just remembered on my black truck I had issues with the Trans not shifting when I had issues with the two plugs that you take apart to lift the cab right under the brake master cylinder.
The Damn things have to be connected all the way or they don't work right. Luckily on mine since the cab had been off 30 times the plug was completely trashed I had to actually zip tie it tight at the lake to fix it.
It did other odd stuff like make the fan run, a/c compressor wouldn't cycle, dashdaq would loose communication.
Look into that pull the left inner fender check the pins and plugs and make sure nothing is pushed back. I also had the 5v reference wire for the egt.sensors pushed out that would cause a no start situation sometimes