I could be very wrong on this, but I think the device that says the pilot is on is a "thermocouple". As I understand it, a thermocouple actually produces voltage when heated, so if there is a pilot/flame, the thermocouple sends voltage that says it's ok to keep sending the gas. Since my water heater out in my garage works on much the same principle without power, I'd have to guess the refrigerator in the TM would also. I'll be the first one to admit I am basing this on theory and without a full understanding of the details.
I'm curious now as well.
Kevin
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2011 Silverado 2500HD Duramax
2004 2720 TM
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