Harold's Used Auto Parts Inc in Philadelphia, PA services all kinds of trucks, regardless of weight class. From small trucks to semi’s, we’ve got you covered. For the sake of curiosity, however, what classifies a truck as light or heavy-duty?

At Harold's Used Auto Parts Inc in Philadelphia, PA, we know that your diesel pickup is more than just transportation; you want a truck that can perform, both at work, off-road, and on the street. A major aspect of your truck’s abilities lies in the suspension components you choose to install. Our team of expert technicians has the knowledge, equipment, and ability necessary to take your truck to the next level and provide you with a suspension setup tailored to your specific needs.

Keeping your fuel system maintained will prevent premature parts failure and poor running conditions. Here are some important aspects of diesel fuel system maintenance, to keep your fleet running smoothly. While your system and components should typically be serviced by a professional technician, there are some things you can be conscious of that will go a long way toward keeping your engine in good shape.

Correct fluid levels are essential to keeping your Ram, Ford, or Chevrolet diesel pickup on the road. Luckily, checking your coolant, oil, brake, and transmission fluid are easy to do, and will save you from a variety of issues down the road. Here’s what you should know about keeping the fluid levels in your truck maintained, from Harold's Used Auto Parts Inc in Philadelphia, PA.

While diesel trucks are some of the best vehicles on the road today, sometimes maintaining a fleet of them can become overwhelming. Let Harold's Used Auto Parts Inc in Philadelphia put your mind at ease, with our fleet maintenance programs for diesel fleet vehicles.

Your injectors are the mechanism that delivers fuel into the cylinders of your diesel engine. As such, they’re clearly important. At Harold's Used Auto Parts Inc in Philadelphia, PA, we will diagnose, maintain, and repair any injector issues you may be experiencing with your commercial or fleet trucks, in a timely and professional manner.

It’s important to keep you Duramax, Cummins, or Power stroke diesel in shape and running strong. Let the technicians at Harold's Used Auto Parts Inc in Philadelphia, PA keep your Chevy, Ford, or Ram pickup in great shape and ready for anything.

The turbo on your diesel pickup is a precision engineered component. As a result, proper maintenance is essential to keeping it going strong. At tens or even hundreds of thousands of RPM, keeping everything in good shape is absolutely necessary. Fortunately, turbos don’t really require any special maintenance - they just make the maintenance you do all the more important.

Whether you drive a Chevy, Ram, or Ford diesel pickup, your truck is a quality engineered machine. At Harold's Used Auto Parts Inc in Philadelphia, PA, we honor that quality - not only in our service, but in the parts, we provide as well.

At Harold's Used Auto Parts Inc, we have earned our reputation as the top diesel repair center in Philadelphia, PA. A major aspect of that reputation is our team of expert mechanics, and another is our versatility. Our technicians have the knowledge, equipment, and ability to repair or maintain any type of diesel engine, big or small.

Fuel Systems are particularly important on diesel trucks, whether you drive a Ford, Chevrolet, or Dodge pickup. At Harold's Used Auto Parts Inc in Philadelphia, PA, fuel system maintenance and repair is a service we prioritize, since we know how essential a reliable fuel system is.

Fuel Systems are particularly important on diesel trucks, whether you drive a Ford, Chevrolet, or Dodge pickup. At Harold's Used Auto Parts Inc in Philadelphia, fuel system maintenance and repair is a service we prioritize, since we know how essential a reliable fuel system is.

Whether you drive a Chevy, Ram, or Ford diesel pickup, Harold's Used Auto Parts Inc in Philadelphia, PA is here to make sure your truck stays up to the task for a long time to come.

No matter what type of car, truck, or SUV you drive, the professionals at Harold's Used Auto Parts Inc in Philadelphia, PA have you covered. Our technicians are well equipped with the tools and knowledge necessary to fix or maintain all makes and models, including diesels.

The Turbo on your Chevrolet, Dodge, or Ford diesel truck is an integral component of your truck’s ability to perform. Turbos affect everything from power output to fuel mileage, allowing your pickup to reach its full potential in terms of power, torque, and efficiency. At Harold's Used Auto Parts Inc in Philadelphia, turbo knowledge is one of our specialties, because we understand the importance of quality turbo parts, replacements, and repair.

Oil changes are integral to the performance, longevity, and reliability of your diesel truck. At Harold's Used Auto Parts Inc in Philadelphia, our expert mechanics understand the importance of good quality oil, changed at correct intervals, in allowing you to get the most out of your Cummins, Powerstroke, or Duramax diesel.

Your fleet or commercial vehicles most likely spend a lot of time idling. Whether it’s to keep warm or simply out of convenience, the stop and go lifespan of these vehicles mean idling is a part of their duties. But, is it bad for them? Harold's Used Auto Parts Inc in Philadelphia, PA has the information you need.

Glow Plugs are an essential component of your diesel engine. However, a faulty glow plug can go unnoticed or be neglected for quite some time; your truck will still start and run, so it’s an easy issue to overlook. At Harold's Used Auto Parts Inc in Philadelphia, PA, we want you to know what to look for, and why you should be concerned with a bad glow plug.

The engine and transmission 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, we repair, rebuild, and replace engines or transmissions with quality parts and builds, keeping your truck on the road for years to come.

At Harold's Used Auto Parts Inc in Philadelphia, we know that keeping up with required maintenance schedules is the difference between a truck that lasts a few years and a truck that stays strong for decades.