| Business | Phone |
| Advanced Smog & Repair Inc 12939 San Fernando Rd, Sylmar 91342 | (818) 833-7772 |
| Diesel Air Fleet Svc 15048 Ararat St, Sylmar 91342 | (310) 823-3508 |
| Dino's Smog 12909 San Fernando Rd, Sylmar 91342 | (818) 362-2966 |
| Hills Smog Test Only 12680 Foothill Blvd, Sylmar 91342 | (818) 838-0946 |
| Kwik Smog Test Only 12965 San Fernando Rd, Sylmar 91342 | (818) 364-0020 |
| Sylmar Smog Test Only 13883 1/2 1/2 Foothl Blvd, Sylmar 91342 | (818) 833-8828 |