Help..Loss of Power Steering

Ok..don't know what happened, but I know you're gonna say..chick driving again. Well, I live in the snowy north and hit the ditch with my 2002 GMC Envoy SLT. Snow was half way up the tires (could've been worse I guess). After trying to shovel myself out with my daughter's goalie stick, I spun myself out, but realized I had immediate loss of power steering assist. It was driveable, but very hard, turning both ways. Checked for buildup of snow underneath once I got home and looked clean. Checked to make sure belt was still intact and it was. Checked power steering fluid and it's good. Could it be a sensor of some sort? Maybe traction control from spinning the tires so much to get out? I'm lost here and need help. Maybe pump/hose leak or rack and pinion (I'm hoping NOT). Anyways. Please help if you can. Thank-you kindly.

Can you see if the belt is turning the p/s pump? Also check fluid level, after this you will need a shop to see if the lines to the rack got crushed or some other form of underchassis damage occurred.