Engine Performance problem
2007 GMC Sierra V8 Two Wheel Drive Automatic 77000 miles
My check engine light came on a few weeks ago and it would not come on some times until I drove for awhile. Now it stays on all the time. I had the code read and it came out p0449. How do I go about trouble shooting what the problem is. It happened right after I changer the spark plugs, wires, and the battery so I might have knocked something loose but I cant seem to find anything. Any help would be great.
Thursday, July 1st, 2010 AT 5:18 PM