G4 Tank Lines Llc is an active interstate carrier based in Denver, CO.
No insurance filings on record.
View on FMCSA L&I| Vehicle Type | Owned | Term Leased | Trip Leased |
|---|---|---|---|
| Straight Trucks | 56 | 0 | 0 |
| Tractors | 56 | 0 | 0 |
| Trailers | 67 | 0 | 0 |
| Total Power Units | 56 | ||
Distinct vehicles · 24 mo
vs 56 self-reported (MCS-150)
Top makes
Registered in
Higher values = more violations. 0 = clean record.
| Category |
|---|
| Category | vs. Cohort | vs. State | Reading |
|---|---|---|---|
| Unsafe Driving | 78% | 95% | Worse than most peers |
| HOS Compliance | 95% | 97% | Worse than most peers |
| Driver Fitness | 82% | 96% | Worse than most peers |
| Controlled Substances | 0% | 0% | Better than most peers |
| Vehicle Maintenance | 71% | 91% | 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 | 1 | — | 6.67% |
| Vehicle | 0 | 9 | — | 22.26% |
| Hazmat | 26 | 0 | 0.00% |
| Period | Fatalities | Injuries | Tow-away | Total |
|---|---|---|---|---|
| No crashes recorded | 0 | 0 | 0 | 0 |
Most-cited violation codes
| BASIC Category | Total | Severe | OOS |
|---|---|---|---|
| Vehicle Maintenance | 39 |
| Date | State | Vehicle | Violations | OOS |
|---|---|---|---|---|
| Mar 10, 2026 | TX | TRUCK TRACTOR | 3 | 1 |
| Feb 24, 2026 | MT | TRUCK TRACTOR | 0 | 0 |
| Feb 10, 2026 | TX | TRUCK TRACTOR | 2 | 0 |
| Feb 10, 2026 | TX | TRUCK TRACTOR | 0 | 0 |
| Insp w/ Viol |
|---|
| Measure |
|---|
| Alert |
|---|
| Unsafe Driving | 1 | 0.15 | — |
| HOS Compliance | 3 | 0.43 | — |
| Vehicle Maintenance | 16 | 4.22 | — |
| Driver Fitness | 1 | 0.12 | — |
| Controlled Substances | 0 | 0.00 | — |
| 4.44% |
Where they run
Inspected in 6 states. Top state TX accounts for 46% of activity. Activity outside home state (CO): 89%.
+1 other state with fewer inspections
| 8 |
| Hazardous Materials Compliance | 5 | 1 | 0 |
| Hours-of-Service Compliance | 5 | 1 | 0 |
| Driver Fitness | 1 | 1 | 1 |
| Unsafe Driving | 1 | 0 | 0 |
| Jan 30, 2026 |
| TX |
| TRUCK TRACTOR |
| 0 |
| 0 |
| Jan 27, 2026 | CO | TRUCK TRACTOR | 3 | 0 |
| Jan 15, 2026 | TX | TRUCK TRACTOR | 0 | 0 |
| Jan 14, 2026 | TX | TRUCK TRACTOR | 0 | 0 |
| Jan 13, 2026 | TX | TRUCK TRACTOR | 0 | 0 |
| Jan 12, 2026 | TX | TRUCK TRACTOR | 0 | 0 |
| Date | Code | Description | BASIC | OOS |
|---|---|---|---|---|
| Mar 10, 2026 | 393203E | Cab front bumper missing/unsecured/protrude | Vehicle Maintenance | — |
| Mar 10, 2026 | 393205C | Wheel fasteners loose and/or missing | Vehicle Maintenance | Yes |
| Mar 10, 2026 | 3939H | Inoperable head lamps | Vehicle Maintenance | — |
| Feb 10, 2026 | 3939TS | Inoperative turn signal | Vehicle Maintenance | — |
| Feb 10, 2026 | 39311 | No or defective lighting devices or reflective material as required | Vehicle Maintenance | — |
| Jan 27, 2026 | 3939ALFTSI | Lighting - Front - Turn signal - inoperative | Vehicle Maintenance | — |
| Jan 27, 2026 | 172328DHMM | HM (Markings) - Failing to mark a manual remote shut-off device as required | Hazardous Materials Compliance | — |
| Jan 27, 2026 | 39360E | Windshield - Obstructed | Vehicle Maintenance | — |
| Nov 20, 2025 | 39347B | Mis-matched brake chambers on same axle | Vehicle Maintenance | Yes |
| Nov 3, 2025 | 39360C | Windshield - Damaged or Discolored | Vehicle Maintenance | — |