gear shift problems
When parking in drive way in my 2006 Pontiac Montana, I thought I had shifted to park while foot on brake, when took foot off brake started to go backward...engine still on at the time...I was in reverse. I tried to put it in park and gear shift wouldn't move up anymore and would not move into neutral or drive either. So I turned off the engine...now I can't turn on the van and I can't get it into park either. What broke and what do I do?