help, I have a 95 Buick Lesabre that will not move. it goes in gear but wont move. one person suggested a module near the transmission that would cause the problem, I need to know what the problem is and where this part is and how to change it out. answer asap, please.   kat

Optional Information:
1995 Buick lesabre 3.8 liter

Already Tried:
not much just starting and asking questions of people who would know about the problem tried looking for the module,no luck in finding could you post a diagram of where this part would be in the transmission?