I picked up a 2005 Trailblazer 250 this past weekend. It is not in terrible condition but it has had a hard life. My question is in the transmission. It will go into Forward and Neutral but not Reverse. You can shift it into Reverse and it revs like it’s in reverse but does not move. There is no ticking or grinding in the trans when you shift into Reverse so I am hoping it is nothing major. Thanks for any help.