Power steering whining on my H2 - anybody dealt with this before?

[wilberforcejagger]

Woke up this morning, started my 2006 H2, and heard this horrible groaning noise every time I turned the wheel even a little bit. Checked the power steering fluid and it looked low, so I topped it off but the noise is still there, maybe even a little worse now. I'm parked outside my apartment in JLT and honestly don't feel safe driving it to a shop because the steering feels stiff and unpredictable at low speeds. A neighbor suggested finding a mobile mechanic who actually knows the GMT platform and doesn't just treat it like a normal Chevy truck. I've been doing some digging online and found a service offering Adept Hummer Repair at 800Sayara Dubai, which specifically mentions the H2's hydro-boost braking system and steering rack issues that apparently confuse regular garages. What I really want to know is whether these mobile guys can flush the whole system and replace a pump on the spot, or if they'll just diagnose and leave me to arrange towing anyway. Also curious about pricing because Hummer parts aren't exactly cheap here. Anyone used them for steering or brake work before?