Its a 5-lug pattern no its a 6/5.5 pattern
6x5.5
The lug size for a 1991 GMC Sierra typically features a 6-lug configuration with a lug bolt pattern of 6x5.5 inches (or 6x139.7 mm). The lug nut size is usually 7/16"-20. However, it's always best to verify the specific vehicle's specifications, as variations may exist based on the model and trim.
24
The lug pattern for a 1990 GMC Sierra 1500 is typically 6x5.5 inches (or 6x139.7 mm). This means the vehicle has six bolt holes with a spacing of 5.5 inches between them. It's important to verify the specific model and any modifications, as variations may occur.
8
The 1979 GMC Sierra Grande lug nut spacing is 5-inches. The wheels have 5 lug bolts. Models before 1971 had 6 bolts,with a 5.5-inch spacing.
The lug spacing, or bolt pattern, for a 1998 GMC Sierra with a 5-lug configuration is typically 5x5 (5 bolts in a circle with a diameter of 5 inches). This means the distance between the centers of two adjacent lug holes is measured at 5 inches. It's important to verify this with your specific model, as variations may exist based on the truck's configuration or modifications.
14 x 1.5
Bolt pattern for a 1985 GMC Sierra Classic 1500 is 6x5.5 (That is what mine is)
5on5
6x137.5
6x5.5