Recreational Vehicle Lpg Tank Valve/gauge problems of the 2016 Chevrolet Cruze

The driver information center, speedometer, tachometer, fuel gauge, temp gauge, and touchscreen display quit working this morning on our '16 Cruze. Car starts and runs fine but know way of knowing our speed or what gear it's in. Persists through battery disconnect.

I will start with this has happened twice. I no longer feel safe in my car, but the mechanic cannot figure out what is wrong. My car got stuck at 3,000 rpms while driving in traffic. When I put my foot on the break the car would not come to a stop it kept bucking bucking forward with the engine roaring. I tried putting the car in neutral and that didn't do anything. I finally put the car in park and the car finally stopped moving, but was still revving at 3,000 rpms. I finally had to turn the car off. Once I turned the car back on the guages were were swiping back and forth and then finally I heard a loud clunk and then the gauges went back to normal and the car was okay. I did check to make sure the gas pedal wasn't stuck I pulled it up with my foot, but it was up all the way so the I know the gas pedal was not stuck. This happened during rush hour traffic twice. I fear next time I will not be so lucky. I'm 21 weeks pregnant and I have an 11 year child that drives often with me. This is not safe someone has to do something.

2016 chevy Cruze lmtd ltz, drvg down hwy middle of no where 5 hours from home 1t 1am drvg 70 mph, tms suddenly shows right front passenger tire with a tire pressure of 12lbs, nearest gas station 10 miles down hwy, as drive there tire pressure slowly creeps up to 25 lbs but goes no higher. Get to gas station, tire is not deflated, purchase manual tire gauge shows tire pressure at 32lbs, tms still showing 25lbs even after restarting car several times. Get back on hwy after drvg for another hour, tire pressure goes back to 32lbs.