I had the truck returned to stock settings just to see if that would kill the light. When I pull out the programmer again to reset back to the super performance mode this weekend, I'll check for the codes. I did re-oil the K&N filter awhile back, and that was my first thought why the O2 sensor code was thrown. So I cleaned the sensor and even put on a brand new filter but that didn't take off the service light. I'll try that again, jut because I may not have done a good job cleaning it the first time. Thanks for the input. Still looking for a speed shop and Lightning specialist. Thinking about changing out the pulleys. Too much for me to do. Know anybody reliable?