| Business | Phone |
| Baltimore Mack Trucks Inc 7908 Reichs Ford Rd # A, Frederick 21704 | (301) 668-2330 |
| Grimes Truck Ctr 1301 E Patrick St, Frederick 21701 | (301) 663-6262 |
| Grimes Truck Ctr 440 E Patrick St, Frederick 21701 | (301) 663-0799 |
| Knott & Geisbert 3432 Urbana Pike, Frederick 21704 | (301) 662-3800 |