I too have never come across an RV with separate shut offs for gas appliances. I really see no need for them since the system is so small.
On the stove, turn the valve off at the tank, disconnect the fitting at the stove, install a plug in that line, then turn the gas back on.
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03 Itasca Sunova, Workhorse P32 with the 8.1 and 4L85-E
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