Glassfab Tempering Services Inc is an active interstate carrier based in Tracy, CA.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 21 | 0 | 0 |
| Tractors | 0 | 13 | 0 |
| Trailers | 15 | 0 | 0 |
| Total Power Units | 34 | ||
Distinct vehicles · 24 mo
vs 34 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category | Insp w/ Viol |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 58% | 93% | Around peer average |
| HOS Compliance | 72% | 92% | Around peer average |
| Driver Fitness | 0% | 0% | Better than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 53% | 84% | Around peer average |
Lower percentile = lower SMS measure = stronger safety record. Computed nightly across active carriers in the same state and fleet-size band.
| Type | Inspections | OOS | OOS % | Nat'l Avg |
|---|---|---|---|---|
| Driver | 0 | 0 | — | 6.67% |
| Vehicle | 0 | 16 | — | 22.26% |
| Hazmat | 0 | 0 | — |
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| Jul 1, 2024 | 1 | 1 | 1 | 1 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 32 | 14 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Mar 24, 2026 | CA | STRAIGHT TRUCK | 0 | 0 |
| Mar 20, 2026 | CA | STRAIGHT TRUCK | 0 | 0 |
| Mar 16, 2026 | CA | TRUCK TRACTOR | 0 | 0 |
| Mar 9, 2026 | CA | STRAIGHT TRUCK | 0 | 0 |
| Mar 9, 2026 | CA |
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 1 | 0.03 | — |
| HOS Compliance | 1 | 0.08 | — |
| Vehicle Maintenance | 23 | 1.53 | — |
| Driver Fitness | 0 | 0.00 | — |
| Controlled Substances | 0 | 0.00 | — |
| 4.44% |
Where they run
Inspected in 4 states. Top state CA accounts for 92% of activity. Activity outside home state (CA): 8%.
| 15 |
| Hours-of-Service Compliance | 1 | 1 | 0 |
| Unsafe Driving | 1 | 0 | 0 |
| TRUCK TRACTOR |
| 3 |
| 1 |
| Mar 3, 2026 | CA | STRAIGHT TRUCK | 0 | 0 |
| Feb 25, 2026 | OR | TRUCK TRACTOR | 3 | 2 |
| Feb 18, 2026 | CA | STRAIGHT TRUCK | 0 | 0 |
| Feb 13, 2026 | CA | STRAIGHT TRUCK | 0 | 0 |
| Feb 12, 2026 | CA | STRAIGHT TRUCK | 0 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Mar 9, 2026 | 39347E | Brake Out of Adjustment - Roto Clamp (Short & Long) DD-3 or Bolt | Vehicle Maintenance | — |
| Mar 9, 2026 | 39353BB | Air Brake - CMV manufactured on or after 10/20/1994 has an automatic airbrake adjustment system that fails to compensate for wear | Vehicle Maintenance | — |
| Mar 9, 2026 | 3963A1BOS | Brake - Defective brake(s) are equal to or greater than 20% of the service brakes on the vehicle/combination | Vehicle Maintenance | Yes |
| Feb 25, 2026 | 3929A2C | Cargo - Vehicle components or dunnage not secured | Vehicle Maintenance | Yes |
| Feb 25, 2026 | 39375A3TAOLTIS | Tires - All others leaking in tread area and inflation less than 50% of the maximum inflation pressure on tire equipped with ATIS | Vehicle Maintenance | Yes |
| Feb 25, 2026 | 3958EHOSPD | HOS (Property) - No driver may make a false report in connection with a duty status. Explain | Hours-of-Service Compliance | — |
| Feb 6, 2026 | 393106C2C | Cargo - Transverse tiedowns - cargo without direct contact to prevent shifting | Vehicle Maintenance | Yes |
| Dec 3, 2025 | 39395A4EEUS | Emergency Equipment - Fire Extinguishers - unsecured | Vehicle Maintenance | — |
| Dec 1, 2025 | 39348ABIBD | Drum Brake - Inoperative other than a steering axle | Vehicle Maintenance | — |
| Dec 1, 2025 | 39375A3TAOL | Tires - All others leaking or inflation less than 50% of the maximum inflation pressure on tire not equipped with ATIS | Vehicle Maintenance | Yes |