check engine light=i need help...

[ROV Hawk]

ok so my check engine light came on a few months ago and it coded out as the EGR valve...reseated the plug and the light went away and the truck ran better...check engine light comes on again about 2 days after i put my CAI on...checked the code and it says banks 1&2 are running lean...the only option i've heard from some other car guys is clean my MAF..that oil could have contaminated it...if anyone else has ANY ideas before i bring it to chevy and bent over a barrel i would greatly appreciate it...is it possible the EGR valve is still messing up?? maybe an O2 sensor?? any trouble shooting ideas are welcome...thanks guys

 

[bkboatnsleds]

What are the code #'s its throwing?

Could be intake gaskets too (and just a coincidence with the CAI being installed)

But yes I agree clean the MAF - reset the codes and see what happens too.