Have a 2005 CTS "V". check engine light started coming on after I re[placed the air filter with a KN. First, I thought it was bad (93)gas because the light did clear after I filled the tank with a better brand of gas. It continued to come on and off and finally, it stayed on. A diagnostic reviled code ECM P013. I replaced the KN filter with an OME filter with no success. The car has less than 75,000 miles, Stealth Gray.
Them Saints
Them Saints
