The Power Gear unit has two fill caps on the top of its tank or canister. If you pull one of the caps out, it should have a small dip stick on it. There are no marks on it, but I have marked mine by cutting small lines across it, every one quarter inch, just for reference. Be sure to retract your jacks completely before pulling the dip stick cap to determine the status of your fluid. The tank, when jacks are fully retracted, should be full to the top quarter inch. That will put enough fluid in the system to fully deploy your jacks, and enough to prevent the "jacks down" alarm from being tripped. ATF is your friend, match what's in it if you know. Dexron or mercon....good luck. Exercise them regularly and spray them liberally often; and you'll find they work great. If you ignore or neglect them, they will try to ruin your good times.
Best of Luck...JJ
John & Susan Johnson with Bailey
w/ Toad 2016 Cadillac SRX