2002 Trailblazer LTZ won’t move in Drive

What is your question?

Was driving and heard a knock my car stopped moving. It would move in reverse First Shift and Second but won’t in Drive and third. Changed the transmission filter. Please help. 4wheel drive only 155244. I think it’s the transmission but I’m hoping it’s not

What makes this problem better or worse?

Can’t drive it

How long has your 2002 Chevrolet Trailblazer had this problem?

2 weeks