My Acadia has 70k on it and had the check engine light come on. Before the cel came on the traction control light would periodically come on from time to time. I have done some research on both problems but my main concern it the code P0496 evap problem. The traction control problem seems to be gone because I had the brake pads cleaned and the magnet that collects debris wiped off. Does anyone know about this specific code, I have been to a local mechanic that thought the only problem could be a pressure sensor switch in the gas tank. He put a new switch in but the check engine light came back on. Also the remote start would not work, but have heard that it will not work if there is a check engine light on. When I went to get in to the vechicle at the local mechanic I thought I would try the remote start it worked but then got into the car and the check engine light was on. The good news is the mechanic gave me a refund since he could not fix the car. I am going to have to take it to a gm dealer, just want to have as much info as I can. Please help.