| 1975 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1976 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1977 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1978 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1979 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1980 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1981 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1982 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1983 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1984 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1985 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1986 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1987 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1988 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1989 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1990 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1991 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1976 |  GMC |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1977 |  GMC |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1978 |  GMC |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1979 |  GMC |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1980 |  GMC |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1981 |  GMC |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1982 |  GMC |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1983 |  GMC |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1984 |  GMC |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1985 |  GMC |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1986 |  GMC |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1987 |  GMC |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1988 |  GMC |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1989 |  GMC |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1990 |  GMC |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1991 |  GMC |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1975 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1976 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1977 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1978 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1979 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1980 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1981 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1982 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1983 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1984 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1985 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1986 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1987 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1988 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1989 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1990 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1991 |  Chevrolet |  G30 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1975 |  GMC |  G35 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1976 |  GMC |  G35 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1977 |  GMC |  G35 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1978 |  GMC |  G35 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1979 |  GMC |  G3500 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1980 |  GMC |  G3500 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1981 |  GMC |  G3500 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1982 |  GMC |  G3500 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1983 |  GMC |  G3500 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1984 |  GMC |  G3500 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1985 |  GMC |  G3500 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1986 |  GMC |  G3500 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1987 |  GMC |  G3500 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1988 |  GMC |  G3500 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1989 |  GMC |  G3500 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1990 |  GMC |  G3500 |  | 56 inch. Fits models with U-Bolt Down. | 
| 1991 |  GMC |  G3500 |  | 56 inch. Fits models with U-Bolt Down. |