My cts v is not running well at all, im getteing the service traction light on, a cel with 3 codes P0174- system Too Lean, P0300-random missfier, and P0303 cylinder 3 misfire, haven't check the plugs or wires yet but I dont think it would lie there, most likely in the tune, my LT fule trims were around 15 to 16 any thoughts, last time I had it tune was in the summer, and its around 35-45 degrees out would that be the culprit? thanks in advance