Not shifting gears properly or at all on 2007 Chevrolet Avalanche

stopped at a stop sign and when tried to drive, couldnt, engine just reved. Had to shift to 1 then work my way up to D. I have to do that everytime now, is the trans gone? does it need some kind of fluid other than trans fluid, that was at the proper level.

1 answer 1 comment
there is an internal issue. take it to sa trans shop and let them give you an estimate.

Thank you.