HD I/M
Welcome to your trusted source for HD I/M services—your go-to experts for everything related to heavy-duty truck inspections, emissions testing, and Clean Truck Check compliance. We specialize in helping fleet owners, truck drivers, and commercial vehicle operators stay on the road legally and safely with certified inspections and detailed guidance. Whether you’re looking for a diesel emissions test, a truck smog check, or support with your clean truck check registration, we’ve got you covered.
Our team understands the complex rules around HD I/M programs, including the newest Clean Truck Check requirements introduced to improve air quality across California. We’re here to help you understand what’s required, how to comply, and where to go for reliable heavy-duty vehicle inspection services. From semi truck smog checks to mobile testing at your location, we make sure your vehicle is up to standard and ready for the road. We also provide on-site truck emissions testing and truck inspection at your location services.
Efficient heavy duty inspection and maintenance program and clean truck program
The Heavy-Duty Inspection and Maintenance (HD I/M) Program is a key part of California’s plan to keep our air clean and our roads safe. This program focuses on reducing harmful emissions from diesel trucks and other heavy-duty vehicles. It ensures trucks are operating efficiently by checking for high-emitting problems and enforcing regular maintenance schedules. Our certified team performs these checks with speed and accuracy, making sure your truck passes the test the first time.
Alongside HD I/M is the Clean Truck Program, which works hand-in-hand to improve air quality and extend the life of your vehicles. This program targets diesel truck emissions and helps identify issues before they become costly repairs. We help truck owners meet Clean Truck Check compliance by offering professional truck emissions testing and personalized recommendations. Whether you’re an independent operator or manage a fleet, we guide you through the clean air inspection process with ease. We also provide services in Moreno Valley and Murrieta .
Best clean truck check exemptions and register for HD/IM program
Not all trucks need to complete every part of the Clean Truck Check. That’s why it’s important to know if you qualify for any clean truck check exemptions. Some vehicles, like zero-emission trucks or certain older models, may not need full testing under current HD I/M rules. We stay up-to-date on changing regulations so we can inform you if your vehicle qualifies. That means no unnecessary testing or fees—just the essentials to keep you moving.
If you’re required to participate, we also help with every step of the HD I/M registration process. We’ll show you how to register for the HDIM program, keep your documents in order, and maintain compliance with ease. Our services include setting up your clean truck check login, explaining the HD I/M requirements, and making sure your clean truck check certificate is processed quickly. Whether it’s your first time or a renewal, we handle the paperwork so you can focus on your business. We also provide clean truck check tester and ctc credentialed tester services.
Trusted By The World's Finest










Why Choose Us?
What is the Clean Truck Check?
We are fully licensed and certified to give HD I/M testing, Clean Truck Check inspections, and diesel emissions services. Our team includes skilled and trained CTC testers who follow the California Air Resources Board (CARB) rules. We know all the rules and stay updated, so your truck meets all inspection needs. Our staff is kind, helpful, and ready to guide you every step. You can count on us to handle your heavy-duty vehicle inspections with care and knowledge.
Fast, Accurate, and Reliable Service
We use modern tools and smart systems to give you correct results. Whether you need a diesel inspection, truck smog check, or full HD I/M test, we make sure it’s done right the first time. Our goal is to test your truck and get you back on the road quickly. We know your time is important, so we work fast but carefully.
Mobile and On-Site Testing Options
If you can’t come to us, we can come to you. We do mobile and on-site truck emissions testing. This means we can test your truck where you are. This is very helpful for fleet businesses or busy drivers. We make it easy to stay on schedule and meet all state rules.
Full Clean Truck Check Compliance Assistance
We help you understand and follow all Clean Truck Check rules. We explain what papers you need and show you how to get a clean truck check certificate. Our team makes the whole process simple. Whether it’s your first test or not, we are here to help every step of the way.
Help With HD I/M Registration and Paperwork
Signing up can be confusing. That’s why we do it for you. We show you how to register for the HDIM program, log in to your clean truck check account, and send in your papers the right way. With our help, your registration will be correct and on time.
Exemption Guidance and Vehicle Status Check
Not all trucks need full inspections. Some trucks might be exempt. We help you check if your truck qualifies. We look at your truck’s type, year, and emissions to see if it’s needed. This saves time and money and helps avoid unneeded testing.
Fleet Services That Fit Your Business
If you run a fleet, we have services for you. We do testing, keep track of maintenance, and help with compliance for many trucks. Our system is made to help your trucks stay legal and on the road. We take care of the testing, scheduling, and papers so you can focus on work.
Happy Clients
FAQs
Is Clean Truck Check licensed to do HD I/M and diesel emissions tests?
The Clean Truck Check is a California program that checks diesel trucks and other heavy-duty vehicles for harmful air pollution. It helps make the air cleaner and keeps trucks safe on the road.
Do all trucks need to take the HD I/M test?
No. Some trucks are exempt. Depending on your truck’s year, engine type, or if it’s zero-emission, you may not need testing. We can help you check if your truck is exempt.
How do I register for the HD I/M program?
You can sign up online, but we can help you. We guide you through logging in, filling out forms, and making sure everything is correct.
What documents do I need for a truck inspection?
You usually need your truck’s registration, ID, and past emissions test papers if you have them. We’ll give you a list before your test so you’re ready.
Can you inspect my truck at my location?
Yes, we can come to you. We do mobile and on-site testing. This helps busy drivers and fleet owners who don’t want to travel.
What if my truck fails the Clean Truck Check?
If your truck doesn’t pass, we tell you what went wrong and what to fix. After you fix it, we help you get tested again so you can drive legally.
How often do I need to do a Clean Truck Check?
It depends on your truck. Most trucks are tested once or twice a year. We’ll tell you your schedule and can remind you when your next test is due.