Trucking Laws · Nationwide · October 23, 2026

Pre-Trip Inspection Checklist for Truck Drivers, Step by Step

Every good trucking day starts with a careful walk around the truck. A pre-trip inspection catches small problems in the yard, where they are easy to fix. This guide covers the federal rules, a walkaround checklist and the CDL skills test. It is general information, not legal advice.

Why the pre-trip inspection matters

The New York commercial driver's manual calls safety the most important reason to inspect, and notes that a defect found early could prevent a roadside breakdown. Inspectors who judge a vehicle unsafe can put it out of service until it is fixed.

Federal rule 49 CFR 395.2 counts time spent inspecting a commercial motor vehicle as on-duty time, so a pre-trip belongs in the day's plan. The hours of service break calculator helps map the 14 hour window, and the guide to hours of service and ELD rules explains on-duty time.

What federal rules require

Before driving

Under 49 CFR 396.13, before driving a driver must be satisfied the vehicle is in safe operating condition, review the last driver vehicle inspection report when one is required, and sign it to acknowledge the review and that required repairs have been certified.

Rule 49 CFR 392.7 adds that the driver must be satisfied these parts are in good working order: service brakes and trailer brake connections, parking brake, steering, lights and reflectors, tires, horn, wipers, mirrors, coupling devices, wheels and rims, and emergency equipment.

Driver vehicle inspection reports

Rule 49 CFR 396.11 requires a written driver vehicle inspection report (DVIR) at the end of each day's work on each vehicle, covering the same parts. Key points:

• The report must identify the vehicle and list any defect that would affect safe operation or cause a mechanical breakdown.
• Drivers do not have to prepare a report if no defect is found or reported to them.
• The driver signs it; on a team, one signature is enough if both agree.
• The carrier must repair safety defects and certify the repair, or that none was needed, before the vehicle runs again.
• Carriers keep reports for three months, and reports may be electronic.
• The report rule does not apply to a motor carrier operating only one commercial motor vehicle, among a few other exceptions.

Cargo and annual inspections

Rule 49 CFR 392.9 requires truck drivers to check cargo and securement devices within the first 50 miles of a trip, then again at each change of duty status, or after 3 hours or 150 miles of driving, whichever comes first. Sealed loads a driver has been told not to open, and loads packed in a way that makes inspection impracticable, are exceptions. Under 49 CFR 396.17, each vehicle must also pass a periodic inspection at least once every 12 months, with proof kept on the vehicle.

The walkaround checklist, area by area

State CDL manuals teach a seven-step method and suggest doing it the same way every time. This checklist follows the New York manual, along with the truck maker's specifications.

Approaching the truck

• Look for damage or the truck leaning to one side.
• Look underneath for fresh oil, coolant, grease or fuel leaks.
• Review the last vehicle inspection report.

Engine compartment

With the parking brake on or wheels chocked:

• Engine oil, coolant, power steering fluid and washer fluid levels
• Hoses, battery connections and tie downs
• Belts for tightness and wear, including the air compressor belt if belt driven
• Leaks and cracked or worn wiring insulation

In the cab

• Start the engine with the parking brake on and listen for unusual noises.
• Oil pressure should reach normal within seconds, and warning lights, including ABS, should go out.
• Check steering wheel, clutch, brake controls, horn, wipers and lights for looseness, sticking or damage.
• Check mirrors, windshield and the safety belt.
• Emergency equipment: a fire extinguisher, spare fuses unless the truck has circuit breakers, and warning devices such as three reflective triangles.

Lights

Check low beams, high beams and four-way flashers from outside, then clearance, marker and identification lights, turn signals and stop lights. Clean lights and reflectors along the way.

Tires and wheels

• Proper inflation, no cuts, bulges or tread separation, and valve stems in good shape
• At least 4/32 inch tread depth in every major groove on front tires and 2/32 inch on other tires, per the manual
• Duals not touching and no mixed sizes or mixed radial and bias-ply tires
• Rims not damaged and no missing lugs, studs or clamps; rust around nuts may mean they are loose
• Wheel bearing seals not leaking

Brakes, suspension and air system

• No cracked drums, linings not soaked with oil or worn thin, and brake chamber air hoses not cut or worn
• Slack adjusters on S-cam brakes: with wheels chocked and parking brakes released, one that moves more than about one inch by hand probably needs adjustment
• Springs, spring hangers, shocks and air suspension free of breaks, leaks or missing parts

The final air brake check covers the low air warning, the point where spring brakes come on, the air buildup rate and the leakage rate. Under 49 CFR 393.51, trucks built on or after March 1, 1975 must have a low air warning that meets federal standard FMVSS 121, which calls for a warning when service reservoir pressure is below 60 psi. Older trucks not covered by that standard must warn at 55 psi or below, or at half the compressor governor cutout pressure if that is lower. State manuals differ in how they teach it: the New York manual says the warning should come on before pressure drops below 60 psi, while the Iowa supplement says below 55 psi or the level the manufacturer specifies. Both describe spring brakes coming on between 20 and 45 psi. Check the state CDL manual and the truck maker's specifications. This is general information, not legal advice.

Coupling and trailer

For combination vehicles, the manual adds these checks:

• Fifth wheel securely mounted, greased and with no space between the upper and lower fifth wheel
• Locking jaws closed around the shank of the kingpin, not the head, with the safety latch engaged
• Air lines on the glad hands with no leaks and enough slack for turns, and the electrical cord firmly plugged in
• Sliding fifth wheel pins locked in place
• Landing gear fully raised, undamaged, with the crank handle secured

At the rear, check lights, the license plate, splash guards, rear doors closed and latched, and cargo securement. Once loaded, the truck weight and axle calculator compares scale readings with federal axle limits.

Final checks

Test the parking brake by gently pulling against it in a low gear, then test the service brakes at about five miles per hour, watching for pulling to one side. The manual's advice: if anything unsafe turns up, get it fixed.

The pre-trip on the CDL skills test

Federal rule 49 CFR 383.113 says applicants must identify each safety-related part and explain what needs to be inspected, from the engine compartment and cab to steering, suspension, brakes, wheels and the sides and rear of the vehicle.

The National CDL Manual supplement published by Iowa DOT describes how the modernized test works:

• Applicants must name, point to or touch, and fully explain what each safety critical item is being inspected for to get credit.
• Only one axle has to be inspected, and applicants will not have to crawl under the vehicle.
• An air brake or hydraulic brake check done incorrectly is an automatic failure of the inspection test.
• The inspection test must be passed before moving on to the basic control skills test.

The full path is in how to get a CDL step by step, the written exam is covered in the CDL general knowledge test study guide, and the free CDL practice test helps check knowledge before test day. More free tools are on the Tools page.

Frequently Asked Questions

Is a pre-trip inspection required by law?

Yes. Under 49 CFR 396.13 and 392.7, a driver must be satisfied the vehicle and its key parts are in safe working order before driving.

Do drivers have to fill out a DVIR every day?

Under 49 CFR 396.11, a report is due at the end of each day's work on each vehicle, but not if no defect is found or reported.

How long are inspection reports kept?

Motor carriers keep the report and repair certifications for three months.

Does pre-trip inspection time count as on-duty time?

Yes. Federal rule 49 CFR 395.2 counts inspecting a commercial motor vehicle as on-duty time.

How is the pre-trip graded on the CDL skills test?

Applicants must name, point to or touch, and explain each item, and an incorrect brake check is an automatic failure. Procedures vary by state.

This guide is general information, not legal advice. Inspection procedures and test details vary by state and vehicle, so check the state CDL manual, the truck maker's specifications and current FMCSA rules.

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