| Model# | GMC/Chevrolet Trucks |
| 1000 | 1988 - 1998: 1/2, 3/4 & 1 Ton Long Bed Trucks |
| 1999 - 2000: 1/2, 3/4 & 1 Ton Long Bed Trucks - Old Body Style |
| 1050 | 1988 - 1998: 1/2, 3/4, & 1 Ton Short Bed Trucks |
| 1999 - 2000: 1/2, 3/4, & 1 Ton Short Bed Trucks - Old Body Style |
| 1059 | 1999 - 2001: 1/2 & 3/4 Ton Light Duty Short & Long Bed Trucks - New Body Style |
| 1061 | 2001: 3/4 Ton Heavy Duty Trucks - New Body Style |
| 1062 | 2001: 1 Ton Heavy Duty Trucks - New Body Style |
| 1400 | 1973 - 1987: 1/2, 3/4 & 1 Ton (Requires Drilling) |
| Model# | Ford Trucks |
|---|
| 1100 | 1980 - 1997: 3/4 & 1 Ton without Overload Springs |
| 1997 - 1998: 3/4 & 1 Ton Old Body Style without Overload Springs |
| 1110 | 1980 - 1996: 3/4 & 1 Ton with Overload Springs (Requires Drilling Two Holes) |
| 1997 - 1998: 3/4 & 1 Ton Old Body Style with Overload Springs (Requires Drilling) |
| 1150 | 1980 - 1996: 1/2 Ton Trucks |
| 1197 | 1997 - 2001: 1/2 & Light Duty 3/4 Ton, New Body Style - No Air Bag Overloads |
| 1199 | 1999 - 2001: Heavy Duty 3/4 & 1 Ton Super Duty Trucks |
| 1297 | 1997 - 2000: 1/2 & 3/4 Ton with Airbag Overload Springs - New Body Style |