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.

At Harold's Used Auto Parts Inc in Philadelphia, PA, we understand that big trucks mean bigger risk on the road. Here are some tips to remember, to reduce the likelihood of an accident next time you’re on the job.

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.

At Harold's Used Auto Parts Inc in Philadelphia, we understand how important safety is in the world of truck driving. The stakes are higher in a big truck; potential for damage is obviously far greater, to you, your cargo, and other people on the road. Here are some easy tips that go a long way.

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.

Now that you know why your turbo is necessary, you’ll want to know what the turbocharger is made of. Turbos are intricate and precise components, but not actually all that complicated or difficult to understand. Here’s a rundown on the parts of a turbocharger, from Harold's Used Auto Parts Inc in Philadelphia, PA.

Whether you drive a Powerstroke, Cummins, or Duramax diesel, your truck is a complex piece of equipment. Emissions systems, fuel systems, and systems you’ve probably never heard of all work together to keep your truck going strong. Sometimes, however, a warning light will pop up on your dash, and leave you wondering what’s going on. From ABS to Check Engine Lights, Harold's Used Auto Parts Inc in Philadelphia, PA has you covered.

If you drive a Duramax, Powerstroke, or Cummins diesel, you’ve got a truck that’s built for power and reliability. From our team here at Harold's Used Auto Parts Inc in Philadelphia, PA, here are the keys to unlocking the secret of a finely tuned diesel pickup.

Is your truck used for towing? Whether you’re looking to upgrade your current setup or rig up something new, our technicians have you covered. Here’s some useful information on towing equipment, from Harold's Used Auto Parts Inc in Philadelphia, PA.

Diesel trucks are known for their incredibly reliable engines. At Harold's Used Auto Parts Inc in Philadelphia, we know that the key to a reliable engine is good maintenance. In fleet trucks, the difference between a truck that lasts a million miles and a truck that needs new engine hinges on how well it has been maintained.

Whether you drive a Cummins, Duramax, or Powerstroke diesel truck, there’s a good chance you’re familiar with turbochargers. Over the past couple of decades, turbos have nearly become stock equipment on diesel pickups, and are becoming increasingly common on gas vehicles as well. But what are they, how do they work, and why are they there? Harold's Used Auto Parts Inc in Philadelphia, PA has the answers.