Av8rkirk,
As was stated above, try following the hydraulic hoses from a jack to the pump/reservoir.
Our GBM is 10 years newer than yours, but on ours, each jack has it's own pump & reservoir. Perhaps yours is the same?
And if you don't already know, always check & fill fluid level(s) with the jacks retracted.
It might be helpful if you could post the manufacturer and model of the hydraulic jacks on your rig.
Good Luck,
~Rick
2005 Georgie Boy Cruise Master 3625 DS on a Workhorse W-22
Rick, Gail, 1 girl (27-Angel since 2008), 1 girl (22), 2 boys (23 & 20).
2001 Honda Odyssey, Demco Aluminator tow bar & tow plate, SMI Silent Partner brake controller.