Recreational Vehicle Lpg Tank Valve/gauge problems of the 2001 Saturn LS

I have had nothing but problems since I purchased this used 2001 Saturn in 2001. I have put 2 catalytic converters, steering rack, stabilizer bar, front struts, had a head gasket major problem. I have owned two other new Saturn's with no problems. . . I am roughly disappointed in this car. Also my dash lights dimmed when security light flashed on and when that happened also my temp gauge and gas gauge would go from right to left and then back quickly. I had to have a modular replaced. Again, I am sooooo disappointed with this car. Within the first year of owning this I had two inline fuel filters as the car just stopped while driving. . . Speed went down and down and nothing. Has anyone else had so many problems.