Recreational Vehicle Lpg Tank Valve/gauge problems of the 2005 Chevrolet Tahoe

Speedometer, tachometer, and oil pressure gauge on my 2005 chevy Tahoe stopped working. All of them began to operate sporadically before they stopped completely stopped working. Not only is it extremely dangerous for the speedometer to not work correctly, as it should, but it also leaves me to bear the burden of a financial loss of speeding tickets or any accidents that were caused by its failure. First, the oil pressure gauge stopped work, then the tachometer, and then the speedometer. All of them did the same thing when they stopped working, so I began to think there maybe a bigger problem. Once I started doing some research on-line, I found there was a huge population of 2003-2005 gm vehicle owners affected by this defect. There obviously should have been a recall and probably some lawsuits as well. Please help me.