What kind of slide? Electric, hydraulic? Cable driven, Rack and pinion, or Schwintek.
Is your battery cut off switch in an "off position" (if you have one?). If so, turn it on. Most slides need the battery. The power converter alone (with no battery), plugged into shore power, usually does not have enough "umph" by itself, to move the slides if they are electric.
More details needed please?
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2019 Montana High Country 375FL
2014 Chevy Duramax HD 6.6 - 3500 Diesel Dully Long bed Crew Cab
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