Hello and

and to the Gulf Stream Owners Forum. We are glad to have you join us and we look forward to reading of your adventures and experiences. I am sure you will enjoy the website and forums. Good luck, stay safe and keep us posted.
It sounds like you have an solenoid valve on the hydraulic pump manifold that is either manually open or is defective. What brand of leveling system do you have? The model would also help. When requesting assistance, please supply as much info as possible. Be sure to sett up a signature with your coach info in it also. Thanks.
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Mike, Certified Master RV Technician
Amy, RV Merchandiser; Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser w/ Banks & 2 toads