Recreational Vehicle Lpg Tank Valve/gauge problems of the 2003 Dodge Grand Caravan

During a March 2016 road trip to atlanta, GA, from michigan, while traveling about 65 mph on I-75, temperature gauge needle began to climb toward the red zone on the instrument dial. Within minutes I pulled off onto a highway construction site where I stopped the vehicle and turned off the ignition switch. Opening the hood, I began to investigate the problem(s). Cool upper radiator hose. Cool radiator cap. Turned cap off and discovered no coolant in radiator. No apparent source of leaking. Added ice water from ice chest to radiator hoping to locate source of leak. Turned engine on and located leak beneath passenger side of vehicle: two small holes in corroded exposed steel tubing routing coolant to rear heater assembly in rear of van. The next day discovered that Chrysler had changed the part from steel to aluminum in late 2000's to help prevent the corrosive action of road salt in the northern climates that had affected many similar vehicles during the mid-2000's. However, daimler Chrysler chose not to institute a recall of the faulty designed part fully exposed beneath the vehicle. The cost of replacing the part at the dealership in stone mountain, GA, was around $650. 00 usd, not a huge sum, but obviously not cost-efficient for the automaker and its shareholders. This problem could be life-threatening if the driver and passengers were stranded during the winter months in northern u. S. Or canada, when loss of all coolant occurred. Operating vehicle with no coolant could result in the engine seizing up while traveling at highway speeds, causing injury to driver and passengers and possibly other motorists. A dangerous situation that Chrysler has corrected on its later model vehicles since 2010 or 2011.