Bill, welcome to iRV2.com and the Gulf Stream Owners forum. We are glad to have you join us here. I am not sure I have looked at your year and model and if so it hasn't been resent so I can only suggest where I HAVE seen the hydraulic pump locations in the past. If it is located on driver side under the front slide out it may be covered by a carpeted panel and not visible without removing the access panel. Have you looked in the front behind the grill? I have seen some mounted behind the left front wheel. Good luck and let us know where it is.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7