Yes it is p1810 code. The first time he pulled the tranny he replaced the pressure switch. He wanted to try and see if he could just replace that, but the code came back up so he pulled it a 2nd time and rebuilt it for the most part. They checked the harness and tested the computer. They replaced IAT sensor bc they said it was possible that it was throwing the code. Ill ask him bout the wire issues. The shop is taking it to a GM dealership and they're gonna look at it. Thanx for the reply