03 2500hd dtcs p0101, p0171, p0174
 

hi, i have an 03 chevy 2500hd with the 6.0l about three weeks ago it started throughin code p0101 but it wouldnt stay on i let it go for a week and then it started running rough like it wasnt gettin enough fuel but the check engine light wasnt stayin on so i replaced the fuel filter and it got worst and started throughin a p0171 andp0174 code so i put a new maf and k&n filter for my cai i checked for any leaks on my intake nothin but what gets me the most is if i unplug the electrical part of the maf and clear the codes the truck idles fine alittle slugish and now it reads only one code p0102 (maf circuit low input)

any other ideas

Try cleaning you maf sensor off with MAF cleaner. sometimes the oil from the K&N coats the sensors and makes you throw bank 1 and 2 lean codes. Thats what my experience is with it. I also have the 6.0 with a K&N. I had read that you might need to pick up a "high Flow" Maf sensor or get a tune to make up for the extra airflow coming from the K&N.