Intermittent Cylinder 3 misfire code and intermittent Stabilitrak off light

[Climbhigh300]

2012 Tahoe, I get intermittent check engine light, P0303 code for cyl 3 misfire. Sometimes it goes a week or 2 without a light or code, then it comes on for a few days. Also same issue with Stabilitrak and traction control off messages and dash lights. This is usually accompanied with ABS light on dash too. I might not see any of this for a couple weeks, then it does it for a few days. New plugs, new wires on the way. I’ve already swapped the plugs, wires, and coils from cyl 3 with other cylinders but the code stays on cylinder 3. From what I read, these systems are very sensitive to any type of power irregularities in the electrical system. Any ideas?

 

[Joseph Garcia]

The Stabilitrac and ABS warnings are probably associated with a dirty or failing wheel speed sensor.

If you have a quality bi-directional scanner, it will point you the the specific wheel sensor that is generating the warning.