Its a 5-lug pattern no its a 6/5.5 pattern
6x5.5
24
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.
14 x 1.5
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.
Bolt pattern for a 1985 GMC Sierra Classic 1500 is 6x5.5 (That is what mine is)
5on5
6x137.5
6x5.5
No the Buick pattern is smaller than Chevy
8x6.5