Yep, you are correct, had to look it up. What about this one? 05 Chevy 1500 4X4 6.0L 12592618.bin (1.00 MB)

This one on first page: 05 Chevy 1500 4x4 MPV L59 12592618.bin (1.00 MB) says it's 4x4 but I just checked my buds 2004 SS 6.0L file and it has 4wd option enable too. It's a starting point :)

What engine?