I have a 2007 Avalanche that is showing a misfire in the engine code P0300 and the Stabiltrak Off Stabiltrak needs serviced and traction control off please service traction control keep coming on. I know there are many others with this problem and many different issues that have been tried to fix it. Can anyone please tell me what is going on. I am at a loss and don't want to play a guessing game. Thanks.