| Business | Phone |
| K T Napac Grand Blanc 48439 | (810) 603-0730 |
| Bud Design & Engineering Svc 10775 S Saginaw St B, Grand Blanc 48439 | (810) 695-0793 |
| Colden & Assoc 5376 Mccandlish Rd, Grand Blanc 48439 | (810) 694-3614 |
| Savage Engineering Inc 1245 E Grand Blanc Rd, Grand Blanc 48439 | (810) 603-0600 |