hi. my Hummer is an H3, luxury package, 2008. last night i was parked on a very steep (50 degrees) incline, facing downwards; i attempted to reverse up hill and at the moment i accelerated in reverse the vehicle rolled forward causing a very loud clunk from (I think) the underneath. i immediately stopped - the failed Traction Control System and the failed Stabiliser System lights came on. after about 4 hours i drove home, (about 12 miles) with both warning lights still on. the vehicle seemed OK. my garage is not open until 4 January. do you think the vehicle is OK to drive in the meantime?
HELP!!!!