2002 chevy suburban wouldnt move at stop light
My 2002 chevy suburban wouldn't move at a stop light. Revved up like it wanted to and nothing in 1,2,3 or D. I stepped on it and it made a BIG clunk sound like something broke lose and I babied it home but when I would slow down and then give it a little bit of gas, the clunk sound was there again. I had someone replace the water pump, wires and spark plugs a couple days ago. HELP ME PLEASE!!