LT 285/75R16 Michelin LTX Tires on stock GM Rims

The ~2001 - ~2009 GM 3500 SRW wheels are 16x7 not 16x6.5. You can pick them up pretty cheap (or at least one could when I did it in 2006) Better fit for 285x16 tires, but I wouldn't do that either. On the other hand, Terry Rey has 285s on 16x6.5 stock wheels (if I remember right), and seems satisfied with them.