Okay guys, quick question. I have a 2003 chevy silverado, half ton 4x4 with a 5.3 and the 4l60e, that is starting to slip from 1st to second.. I have a 2005 chevy, same truck, with a 4l60e, with a bad engine. The dealership is telling me that they're different part #s, but not sure what the difference is. My question, can I swap the 2005 trans into the 2003?