Hello everyone, I been having alot of issue with my 2007 avalanche, right now the traction control light come on in the dash when i am at a light and I hear the chime. When i drive off the truck shifts from first to second hard then the light comes off and the truck shifts fine. If I am at the light and the light does not come on it shifts fine. I was told there is a bad valve in my air ride which is causing this to happen. My air ride has not worked in almost a year. Can someone please help figure out what valve or sensor that could be causing this nightmare.