If you own or operate a fleet or commercial truck, there’s a lot that factors into having a major repair done on one of your vehicles. At Harold's Used Auto Parts Inc in Philadelphia, PA, we’re here to help you make the right choice.

There’s a huge percentage of vehicle on the road, right now, with the check engine light illuminated. Many of them have had it on for years, even. Frequently, a check engine light will illuminate, but pose no immediate problems, so people just get used to it and learn to live with it being on. However, Harold's Used Auto Parts Inc in Philadelphia, PA would like you to know that it’s worth having it looked into. Typically, the problem can be diagnosed by simply plugging your car into our computer; the vehicle gives us a code, and we know what the problem is immediately.

At Harold's Used Auto Parts Inc in Philadelphia, PA, our technicians have a wide variety of top of the line tools and equipment available to diagnose and repair your vehicle. We utilize equipment at the forefront of technological innovation to best provide for the specific needs of your car.

Regular maintenance checks of your vehicle will help you avoid a catalytic converter that looks like this resulting in large repair costs which is what our team here at Harold's Used Auto Parts Inc in Philadelphia want to avoid at all costs! We feel that every customer has a need to know what repairs are in their future and exactly how to budget for them if need be so we check your vehicle thoroughly and keep you informed.

There are several indicators that your catalytic converter isn't functioning at maximum capacity such as:

The engine in your Chevrolet, Dodge, or Ford diesel pickup is the heart and soul of your truck. At Harold's Used Auto Parts Inc in Philadelphia, PA, we repair, rebuild, and replace engines with quality parts and builds, keeping your truck on the road for years to come.

At Harold's Used Auto Parts Inc in Philadelphia, PA, we know replacing an entire engine can be a tough call to make - that’s why we’re here to help you make an expert decision on the matter.

It’s not always easy to recognize when your vehicle is suffering from a simple problem that requires a little maintenance and TLC or there is real engine damage as symptoms can be overlooked and seen as “normal.” While not all sounds and smells may threaten the life of your vehicle or truck engine, there are some obvious warning signs that require a vehicle inspection here at the shop right away.

The heads on your commercial or fleet diesel are one of the most integral parts of your engine. The heads are comprised of the valvetrain, exhaust ports, intake ports, and injector ports. In essence, a head’s purpose is to regulate and time the intake of fresh air, the release of exhaust, the compression of fuel and air that provides combustion, and the entry point for fuel into the cylinder. The head is where all the complex aspects of engine operation occur...without it, you just have a chunk of metal with pistons in it, and no way to make them move. Here’s what you need to know about your heads, from Harold's Used Auto Parts Inc in Philadelphia, PA.

Obviously, your engine is the heart and soul of your car, truck, or SUV. When your engine requires maintenance or repair, rest assured your vehicle is in good hands at Harold's Used Auto Parts Inc in Philadelphia.

Commercial trucks have heavy engines, and they spend a lot of time running, particularly at idle. As a result, the mounts that secure the engine to chassis of the truck have a tendency to wear out, causing all sorts of shaking and vibration that the driver will feel in the cab of the truck. At Harold's Used Auto Parts Inc in Philadelphia, we can take care of that for you.

“Spark plug” is a word you are likely familiar with; it’s one of those car terms that you’ve heard your whole life. You know they’re important, you know sometimes they need to be changed. But how do you know when it’s time to replace them? What do they do, and where do they go wrong? Harold's Used Auto Parts Inc in Philadelphia has the answers.

It’s a busy morning, you’ve finally gotten everyone where they need to be and you’re just pulling into the parking lot at work when your dash light starts glaring at you. Your check engine light shines bright, but you have no idea why. Whether you can tell a difference in the way your car, truck, or SUV is running, your car is trying to tell you something. At Harold's Used Auto Parts Inc in Philadelphia, PA, we can help!

Cars, trucks, and SUVs use and create multiple liquid substances. Here’s what you need to know about the puddle of liquid under your vehicle, from Harold's Used Auto Parts Inc in Philadelphia, PA. There are a few different substances that can pool under an automobile, and some are more serious than others. Knowing what to look for and what to do could save you from hassle with your vehicle in the long run.