[Harley03joe]

Originally Posted by FirstOwner69

Your lug nuts are either 1/2" (drum brakes before 1971) or 9/16" (disc brakes 1971 and later). The correct nuts are commonly called dual thread lug nuts and are available on eBay as well as other sources.

9/16"
http://www.ebay.com/itm/32-LUG-NUTS-...9WD1vm&vxp=mtr

1/2"
http://www.ebay.com/itm/32-LUG-NUTS-...VWD11e&vxp=mtr

HERE Is Another List I Found
Joe

Chevrolet / GMC Trucks & SUV
Asrto Van 1985-2002 1/2"
Asrto Van 2003-On 14mm x 1.50
Avalanche 2002-On 14mm x 1.50
Blazer 4X4 (6 Lug) 1971-1991 7/16"
Blazer 2 W/D (5 Lug) 1971-1991 1/2"
Blazer 1992-On 14mm x 1.50
C-10 1971-1988 1/2"
C-1500 (5 Lug) 1971-1987 1/2"
Canyon 2004-On 12mm x 1.50
Caballero & El Camino 1964-1981 7/16"
Caballero & El Camino 1982-1987 12mm x 1.50
Chevy 3/4 Ton Van (5 Lug) 1960-1981 1/2"
Colorado 2004-On 12mm x 1.50
Denali, Express Van, Savana Van 1996-On 14mm x 1.50
Envoy 1999-On 12mm x 1.50
Equinox 2005-On 12mm x 1.50
Jimmy (5 Lug) 1969-1970 7/16"
Jimmy (5 Lug) 1971-1991 1/2"
Jimmy (6 Lug) 1971-1991 7/16"
Lumina Van 1989-On 12mm x 1.50
Luv 1972-1984 12mm x 1.50
Pickup (5 Lug) 1971-1987 1/2"
Pickup (6 Lug) 1950-1987 7/16"
Pickup (8 Lug) 1965-1987 1/2" or 9/16"
Pickups (All) 1988-On 14mm x 1.50
S-10 Blazer 1983-On 12mm x 1.50
S-15, Sonoma & Jimmy 1983-On 12mm x 1.50
Safari 1985-2002 1/2"
Safari 2003-On 14mm x 1.50
Savana, Suburban & Yukon (5 & 6 Lug) 1992-On 14mm x 1.50
SSR 2004-On 12mm x 1.50
Suburban (5 Lug) 1969-1970 1/2"
Suburban (5 Lug) 1971-1991 7/16"
Suburban (6 Lug) 1970-1991 7/16"
Suburban (8 Lug) 1970-1991 9/16"
Tahoe 1995-On 14mm x 1.50
Tracker 1989-On 12mm x 1.25
Trail Blazer 2002-On 12mm x 1.50
Uplander 2005-On 12mm x 1.50
Van 5 (Except Express) 1971-1996 1/2"
Van 6 (Except Express) 1971-1996 7/16"
Van 8 (Except Express) 1965-1996 1/2" or 9/16"
Ventura MiniVan 1997-On 12mm x 1.50
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