| Business | Phone |
| Cummins Rocky Mountain Llc 2700 N Us Highway 14-16, Gillette 82716 | (307) 682-9611 |
| Cummins Rocky Mountain Llc 2703 Hackathorn Ln, Gillette 82716 | (307) 682-5636 |
| Interstate Detroit Diesel Inc 3323 Le Tourneau Dr, Gillette 82718 | (307) 682-8596 |