I have a opossum in my garage that I can't get out, I open the door a little for it to get out but will not leave. What do I do?

Get a trap/cat type. Place water into trap. Should be able to trap it, take it to a river area n release

If you live in the Modesto Area just called the animal shelter on Crows Landing and ask them if they could set up the Trap and possibly if they want to take the opossum to the River area to drop it off or you can do it yourself and they'll probably advise you on what to

Call Animal control

I live in Waterford.