Recreational Vehicle Lpg Tank Valve/gauge problems of the 2010 Cadillac SRX

The idiot light or gauge light came on indicating that there was an electrical problem. We brought the vehicle right back to the used car dealer and he sent the vehicle down the block to the gm dealer who found some corroding wires , he supposedly fixed them. A couple days later the light came on again and w brought the vehicle back to the used car dealer who again brought it to the dealer where the cadilac was found to be heavily corroded in the harness area by the drivers side. . They told us that there might have been a leaf clog by the windshield and the wipers preventing proper drainedge. And the water backed up into the car. They supposedly changed the harness under the drivers mat. A couple of months later we noticed that the whole drivers sidewindow was very wet. . We dismissed this incident with a mutual befuddlement. A couplpe of months later the whole drivers side window was frozen on the inside of the car. Wekind of figured it had something to do with the drivers window being wet monthe earlier. Now here it is in March of 2014 and my wife was looking for something in the car and she happened to touch the passenger front floor matt right after a heavy rain and she found the floormat soaked she got out the wet-dry vac and pulled near a half a gallon of water from the rug underneath the floor mat.