When I upgraded my head unit to a Kenwood, I lost power to the cassette player. Not that big a deal as cassettes are all but obsolete now anyhow. Most of the ones I have have been recorded on CD. My questions are: Which wire in the harness powers the cassette, and if I remove the cassette player, does Chevy offer an optional fillerfor trucks with out the cassette option? If so, does anyone happen to know the part number or where I could obtain it? Thanks.