270 Grant Street, Blair, Nebraska • Diesel Repair Built Around Uptime
402-533-2056stsrepair@sterlingtransportationservices.com
DOT Inspection Checklist • Truck & Trailer Readiness • Compliance Planning

DOT Inspection Checklist for Commercial Trucks & Trailers

Use this practical checklist to prepare for annual DOT inspections, spot common safety concerns, and plan repairs before a deadline turns into downtime.

Serving Blair, Omaha, Fremont, Council Bluffs, owner-operators, contractors, and regional fleets that need inspection readiness before the road exposes the problem.

Truck & Trailer Checklist
Common DOT Trouble Areas
Built Around Uptime

This checklist helps you prepare for:

  • Annual DOT inspection appointments
  • Pre-trip and shop review conversations
  • Fleet maintenance planning
  • Trailer and combination unit readiness
  • Repair prioritization before inspection deadlines
Brake System
Lights & Electrical
Tires & Wheels
Trailer Readiness

Before the Inspection: Look for the Problems That Usually Cost Time

A checklist does not replace a qualified annual DOT inspection, but it does help drivers, owners, and fleet managers prepare better. The goal is simple: identify obvious issues before they create failed inspections, emergency repairs, delayed loads, or roadside attention.

The best time to find a DOT problem is before the truck is already scheduled, loaded, or under pressure.

STS Truck Services uses inspection findings to create clear repair priorities, communicate what matters, and help customers stay ahead of avoidable downtime.

Truck & Trailer DOT Inspection Checklist

Use the sections below as a practical readiness guide before your annual inspection appointment.

Print it, save it, or use it before inspection day.

This checklist is built to be practical for drivers, owner-operators, fleet managers, and contractors. Print the page or download the branded PDF version to keep with your maintenance planning documents.

Download PDF Version

Brake System

  • Air leaks or slow air pressure build-up
  • Brake chambers, hoses, and fittings
  • Brake lining and drum condition
  • Slack adjuster condition and adjustment concerns
  • ABS warning lights or visible ABS wiring damage
  • Parking brake operation
  • Contaminated, cracked, or damaged brake components
  • Uneven braking concerns reported by the driver

Tires, Wheels & Hubs

  • Tread depth and uneven tire wear
  • Sidewall cuts, bulges, exposed cord, or weather cracking
  • Loose, missing, damaged, or mismatched lug nuts
  • Wheel seal leaks or visible hub oil concerns
  • Cracked wheels, rim damage, or impact damage
  • Improper tire inflation or obvious tire damage
  • Dual tires touching or debris between duals
  • Tires marked “Not for Highway Use”

Lights, Electrical & Visibility

  • Headlights, brake lights, turn signals, and marker lights
  • Trailer lights and connector operation
  • Reflectors and conspicuity tape condition
  • Wiring damage, loose connections, or corrosion
  • Windshield condition and wiper operation
  • Horn, mirrors, and visibility-related equipment
  • Dash warning lights that need diagnosis
  • Battery box and cable condition

Steering, Suspension & Undercarriage

  • Steering play, loose components, or worn linkage
  • King pins, tie rods, drag links, and steering gear concerns
  • Spring damage, broken leaves, or shifting components
  • Airbags, shocks, hangers, bushings, and torque rods
  • Frame damage, cracks, or visible structural concerns
  • Driveline, carrier bearing, and U-joint condition
  • Loose, missing, or damaged fasteners
  • Unusual noises, vibration, or handling concerns

Leaks, Fluids & Engine Area

  • Oil, coolant, fuel, DEF, hydraulic, or air leaks
  • Coolant hoses, belts, clamps, and visible wear
  • Exhaust leaks, damaged mounts, or loose components
  • Aftertreatment warning lights or visible DPF/SCR concerns
  • Fuel system leaks or damaged lines
  • Battery corrosion or unsecured components
  • Low fluid levels or contamination concerns
  • Visible damage that could affect safe operation

Trailer & Combination Unit Items

  • Trailer brakes, air lines, glad hands, and ABS light
  • Landing gear operation and structural condition
  • Kingpin, fifth wheel, pintle hook, or coupling device concerns
  • Safety chains, breakaway system, and securement items
  • Doors, hinges, latches, ramps, and deck condition
  • Trailer suspension, tires, lights, and reflectors
  • Load securement components and visible damage
  • Proper identification of trailer inspection documentation

Documentation & Compliance Readiness

  • Current annual inspection documentation
  • Inspection date shown on sticker, decal, or report
  • Driver knows where inspection documentation is located
  • Registration and required vehicle documents are available
  • DOT number and company markings are legible when required
  • Fire extinguisher and emergency triangles are present when applicable
  • Combination units are clearly identified in documentation
  • Prior defects or repair recommendations have been reviewed

A checklist helps you prepare. It does not replace the inspection.

This page is designed as a practical preparation guide. Annual DOT inspections should be completed by a qualified inspector who can evaluate the vehicle against applicable inspection standards and document the results properly.

How STS Turns Checklist Findings Into a Repair Plan

Finding an issue is only useful when the next step is clear. STS Truck Services helps prioritize what affects inspection readiness, what affects safety, and what can be planned before it turns into a breakdown.

Step 1

Inspect

We review the truck, trailer, or combination unit for safety, compliance, and visible defect concerns.

Step 2

Document

Findings can include technician notes, repair recommendations, and photo documentation when applicable.

Step 3

Prioritize

We help separate urgent inspection concerns from maintenance items that can be planned strategically.

For Owner-Operators

Use the checklist to catch issues before they interrupt your schedule, your load, or your ability to keep earning.

For Fleets & Contractors

Use the checklist to support PM planning, reduce surprise repairs, and keep inspection readiness visible across multiple units.

Related Inspection & Repair Support

DOT inspection readiness often connects directly to repair and maintenance planning. These STS services can help when checklist items turn into actual repair needs.

Do Not Wait for a Roadside Inspection to Find the Problem First

Get the truck inspected, understand the findings, and fix the right issues before they cost you a load, a driver, or a day of downtime.

Contact STS Truck Services

Have questions about DOT inspection readiness, checklist findings, or commercial truck and trailer repair? Contact STS Truck Services in Blair, Nebraska.

STS Truck Services

Address:
270 Grant Street
Blair, NE 68008

Phone:
402-533-2056

Email:
stsrepair@sterlingtransportationservices.com

Schedule Inspection or Repair

Ready to schedule a DOT inspection, review checklist findings, or plan repairs before downtime hits? Call STS or submit your request online.

Request Repair Online