The truck half of a Level I.
A full Level I has two halves — the driver and the truck. This is the truck half: roughly two dozen of the 37 steps, worked in a consistent order, recorded on the Driver Vehicle Examination Report.
The federal authority to inspect a vehicle in operation is 49 CFR § 396.9; the equipment standards themselves live in Part 393. Before any of that, the inspector looks for one thing on the glass — the annual inspection sticker. Know the order and you can walk your own truck the same way they will.
Eight systems, brakes first.
One of these is flagged — it's the finding most likely to park your truck.
- 01#1 OOS
Brake systems
Pushrod travel, lining thickness, air loss, and — for combinations — the trailer brake connections. Year after year, brakes are the largest single vehicle out-of-service category on the continent. If the inspector starts anywhere, it's here.
- 02
Steering & suspension
Steering-wheel free play, the steering column and gear box, plus springs, hangers, U-bolts, and the frame. Looseness here is what an inspector ties directly to “likely to cause an accident.”
- 03
Tires, wheels & rims
Tread depth, sidewall condition, flats and exposed cord, plus cracked or improperly fastened wheels, rims, and hubs. A single flat-tire or loose-wheel finding can park the truck on its own.
- 04
Lighting & reflectors
Required lamps working, conspicuity marking intact. Lighting is among the most common write-ups precisely because it's the easiest to miss on a hurried pre-trip — and the easiest for an officer to see from outside the cab.
- 05
Coupling devices & fifth wheel
The fifth wheel, kingpin, locking jaws, mounting, and safety devices. On a combination this is the literal point of failure — inspectors give it close attention.
- 06
Exhaust, fuel & driveline
Leaks, secure mounting, and any condition that could start a fire or drop a component on the road. Quiet items that nonetheless meet out-of-service criteria when they fail.
- 07
Cargo securement
Tiedowns, working-load limits, and load placement under § 392.9 and the Part 393 securement standards. Shifting or under-secured freight is both a violation and a genuine hazard.
- 08
Glass, wipers & mirrors
Windshield condition, wiper operation, and required mirrors. Lower-drama items, but a cracked windshield in the driver's field of vision still earns a line on the report.
Brakes are checked first because brakes fail first. More trucks are put out of service for brakes than for any other single thing on the vehicle.
— Why the order matters
The annual inspection has to ride in the truck.
Under § 396.17, every commercial motor vehicle must pass a periodic inspection against the Appendix A standards at least once every 12 months, and the documentation has to be on the vehicle. In a combination, each unit is inspected separately — the tractor, the semitrailer, the full trailer, and the converter dolly if so equipped.
The proof can be the inspection report or a sticker/decal, but it must carry the inspection date, the name and address of wherever the report is kept, information identifying the vehicle, and a certification that it passed. A qualifying state periodic inspection counts for 12 months from the last day of the month it was performed. No documentation is a finding before the walk-around even begins.
This is the half you can't talk your way out of — the truck either passes or it doesn't. Build the routine that keeps it passing in how to pass before you're stopped, and see where this fits among the 8 inspection levels.
The inspector walks the truck in the same order, every time. The carriers who pass walk it first — in their own yard, where a finding is just a repair.
A clean roadside is a lower score — and a cheaper renewal.
Brakes, lights, securement, and a current annual inspection are won in the shop, not at the roadside. We keep the paper that proves it — annual-inspection records, the maintenance file, and the audit trail behind them — so a Level I vehicle exam is a non-event and your out-of-service rate stays off your CSA profile.