2007 Chevrolet Trailblazer stability control problems

Filled my tank and drove away the morning of the incident. While driving later that day my fuel gauge started going down while driving. It went to empty the low gas indicator light came on and it stayed that way for a few minutes before returning to full. This only happened 1x so far recently. I've also had problem with all the gauges going out while driving. Speedometer/fuel/ electrical/tach etc. Had to turn off the vehicle and restart to reset these functions in the past. 2-3x an had onstar run diagnostics.

Truck failed to accelerator pedal depressed, activating stabitrak control.. Had to accelerate the pedal several times before the truck accelerate ans reacted..had to take off stabiltrak to drive the truck. Changed changed hubs and several sensors. Getting no codes..took it to several service stations including the chevy dealers and got no answers but to want to charge me for repairs not needed..I love my truck don't want to get rid of it.