Row of Tractor Trailers parked and being repaired

Truck Repair Service That’s About You—Our Customer

At S.E. Smith & Sons, INC., we provide numerous truck repair and services to ensure your truck, trailer, and car repairs are convenient, accurate, and fast. For fleet trucks, we do BIT and DOT inspections, and offer roadside service in the event of a breakdown. Our ASE-certified technicians are equipped with seven factory scanners, and are experts in computer programming, as well as all types of vehicle systems, from ABS brakes to wheel alignments. We make it our priority to keep your vehicle running safely and efficiently. Take a look at all we do!

They say Azusa stands for everything from A to Z in the U.S.A.—that’s true for us when it comes to trucks!

Truck Repair & Maintenance Services

  • Trailer Fabrication
  • Computerized Truck Wheel Alignments
  • Diesel Engine Overhauls
  • BIT & DOT Inspections
  • Diagnostics
  • Truck Heating & A/C
  • Road Side Assistance
  • Mobile Repair
  • BIT Inspections
  • DOT Inspections
  • Diesel Repair
  • Light-Duty Truck Repair
  • Medium-Duty Truck Repair
  • Suspension
  • Diagnostics
  • Transmission Repair
  • Differential Repair
  • Driveline Repairs
  • Hydraulic Repairs
  • Aerial Devices
  • Emission System Repairs
  • Annual Inspections
  • DOT Inspections
  • Tune-ups
  • A/C – Air Conditioning
  • Heating Systems
  • Oil Change / Lube Service
  • Radiator Service – Cooler Repair
  • Clutch Repair & Replacement
  • Scheduled Maintenance
  • Fleet Service
  • Air Brake System
  • Brakes
  • Steering
  • Coolant / Antifreeze
  • Wheel / Tire Alignment
  • Exhaust / Muffler Service & Repair
  • Differential Replacement & Repair
  • Engine Replacement & Repair
  • Welding
  • Air Filter Replacement
  • Fabrication
  • Electrical Repair
  • Lift Gate Service
  • Lights
  • Refrigerated Transport
  • Check Engine Light
  • Drivability Issues
  • Preventive Maintenance

Here's More on Our Specialty Services

  • Mechanic working on truck

    Trailer Fabrication

    At S.E. Smith & Sons, we can handle a variety of semi-trailer and utility trailer issues at our facility, including walls, roofs, brakes, and airline systems. Our trailer techs are equipped to do trailer fabrication inhouse, so you can count on us to handle everything you need, from repairs to entirely new parts. We’re also skilled at repairing lift gates, roll-up doors and swing doors. Count on us make sure your trailer is safe and functioning properly when you hit the road.

  • Two mechanics working on truck

    Computerized Truck Wheel Alignments

    Wheel alignments keep your truck running safely and efficiently by promoting reduced tire wear, better gas mileage, and safer driving conditions. Left alone, wheel alignment issues have the potential to turn into steering and suspension issues because driving with wheels out of alignment not only puts stress on your tires but also on suspension components. We perform computerized wheel alignments to ensure your truck is totally balanced to factory specifications.

  • Mechanic working on engine

    Diesel Engine Overhauls

    Sometimes buying a brand-new truck is not an option, or maybe you’re not ready to retire a truck that’s still serving you well in a lot of ways. Our ASE-certified mechanics have the skill and experience to break down, clean, service, repair, and re-assemble your failing engine block to prolong the lifespan of your engine. In many cases, we can gain you years on a truck that the dealer may have told you had driven its last mile.

  • BIT & DOT Inspections

    BIT & DOT Inspections

    An essential part of owning and operating a truck is making sure you’re driving within FMCSA (federal) and CHP (California) standards. At S.E. Smith & Sons, we help truck drivers and businesses stay in compliance by making sure all truck systems are functioning properly and safely. If our mechanics need to make a repair or perform a maintenance service for you to pass BIT or DOT inspection, we’ll take care of what you need expertly and efficiently.

  • Truck Diagnostics


    While regular engine maintenance will help ensure your engine performs at peak condition, it’s important to watch out for signs your engine may need service. The check engine light or service engine light is a sure sign your engine should be looked at by an expert sooner rather than later. At S.E. Smith & Sons, we have the latest factory scanners for many truck makes and models to pinpoint issues quickly and accurately.

  • Tractor trailer on road in a cold snowing day.

    Truck Heating & A/C

    Professional drivers need their vehicles’ air conditioning and heating systems to be fully operational to be as productive as possible at their jobs. It’s simply too hot here in California to not have working A/C in your truck. At S.E. Smith & Sons, we can pinpoint and repair any issues you’re experiencing with your A/C or heating system, whether you need a simple recharge or attention to your compressor, receiver, condenser, hoses, or electronic climate control units.