Gauge’s don’t work and transmission won’t shift

[RWF1970]

Got in truck after work started fine pulled it into drive and pulled out wouldn’t shift and the gauges were not working. Pulled over and re-started it and waited a second and the garages started working and pulled out and it shifted but didn’t shift right. Kept driving and when it warmed up it shifted fine all the way home.  But when I turned it off the gauges  didn’t go to the left instead they went to the right. Any ideas??? 

[2018GMC]

Sounds like a bad ground. Follow the negative battery cable and check for corrosion at battery, battery to frame, engine to frame. 

 

If grounds are good then could be ignition switch. A bad ignition switch can cause gauge and transmission shifting issues. Search YouTube on replacing ignition switch for how to. 

[ryank1]

Most likely a bad ignition switch, it was common on these trucks.