depends on if the buyer or dealer ordered it as an option.
i don't think it was standard for the Roo 17.
for the propane DSI, easy to tell, just look for a red toggle switch that lights up when turned on. it'll stay on until the pilot lights. the water pump has a red toggle switch also, though.
for the electric, just go outside to the WH hatch door and look for a black toggle switch on the WH. it'll have a cotter pin through it.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC