I paid $28 to talk to a chevy tech online. The IAT sensor is built into the MAF sensor, like I thought. He thinks it's a short in the wire or connector. Told me which wires to jump to see if that is it(brown and white) I'm now looking online how to check for wire shorts. visibly, I see nothing out of the ordinary. Nothing burnt, fraid, crumbling, rusting. connector looks good. sprayed some electronic cleaner in it. still the same p0113 code. been looking online and at the part stores for a new connector, but couldn't find anyone who carried it (pepboys, advanced auto, autozone). techs at all 3 places said it would probably be a dealer part......great. going on 2 weeks now. I'm trying 1 more thing, then bringing it in. Oh well, I tried.