Ok folks... This is for all of you GM techs. (Ford guys... I don't wanna hear about it.. )
I have a Duramax 2wd Alison in a 2002 Chevy Silverado. I have a Bassani Exhaust, Edge Performance/Diesel Dynamics Juice and Attitude and a K&N KIPK. The truck just turned 39K.
I am a nazi about maintenance, and do the oil, fuel filter, rear end and tranny oil regularly. I just got this Service Engine soon light lit though, and it appears to have really degraded my performance. When you floor it, there is no big black smoke any more on level 5/5 and it certainly doesn't pull as hard.
Any way to pull a code, or reset the light without a dealership visit? Nothing on the truck is warrantied with the C-notched rear frame and engine mods, and I fear they will see me coming on a bill.
Help please!