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I have a 2012 sierra 1500 4x4 5.3L.140K. number 4 burns oil and fouls the plug and uses a qt of oil every 500 miles. So I changed the plug the other day and a couple days later after driving for about 30 mins the traction off and stabilitrak off lights pop on. then trans downshifts hard and the upshift is also different. I have heard that if the ECM detects a misfire it will cause this to happen. So what's the fix for this other than a new truck :) I ordered a ranger bypass module to turn off the 4/6/8 B/S also is supposed to help with the oil consumption. Thanks for any help.
 

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Afm/DOD delete. And a custom tune.
 
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