i did a search on this and i came up with this. it doesn`t look like they`ll fit.
6 x 5 (same as 6 x 127)
Buick
2004-2007 Rainier
Chevrolet
2002-2009 Trailblazer
2002-2006 Trailblazer EXT
2006-2009 Trailblazer SS
GMC
2002-2009 Envoy
2005-2009 Envoy Denali
2003-2006 Envoy XL
2005-2009 Envoy XL Denali
2003-2005 Envoy XUV
and for your truck..............................................
6 x 5.5 (same as 6 x 139.7)
Chevrolet (6-lug)
1973-1994 Blazer
1973-2009 Silverado 1500
1973-2009 Silverado 2500
1995-2009 Tahoe
1973-2009 Suburban
1999-2009 Avalanche
1996-2009 Express 1500
1971-1995 G10 / 1500
1971-1995 G20 / 2500
2003-2005 Astro Van
2004-2009 Colorado
GMC (6-lug)
1973-1994 Jimmy
1992-2009 Yukon
1999-2009 Yukon Denali
2000-2009 Yukon XL
2002-2009 Yukon XL Denali
1992-1999 Suburban
1973-2009 Sierra 1500
1973-2009 Sierra 2500
2001-2009 Sierra Denali / C3
1971-1995 Van G10 / 1500
1971-1995 Van G20 / 2500
1996-2009 Savana 1500
2003-2005 Safari Van
2004-2009 Canyon