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When you’re driving a GMC Duramax truck, you need to know that you can rely on it to get you where you need to go in some pretty rough conditions. That’s why you should make sure you have all the information you need about the common problems these trucks face and know where to go to have them properly repaired.

One of these common issues is injector harness chafing. Fortunately, this can be prevented or repaired with the help of a knowledgeable diesel truck mechanic. The purpose of the injector harness is to hold the wires of the fuel injector in place to keep them from becoming damaged. However, in certain GMCs, the placement of these harnesses can sometimes cause the wires inside them to wear down prematurely as they rub against the metal flanges they are zip-tied to.

One way to prevent this from happening is to use a protective material to put in between the wires and the metal, a task that is probably best left to a professional mechanic. Working within these areas can be very intricate, and unless you have auto repair experience, you may end up doing more harm than good with a DIY attempt.

Symptoms of Injector Harness Chafing

Of course, looking at the injector harness and seeing that it has worn down will tell you that chafing is the problem, but if you don’t know what you’re looking for, it might be hard to find the exact location to determine if that is the problem.

Aside from visual detection, many of the common symptoms of a faulty fuel injector will also be caused by worn-down wires in the injector’s harness. This occurs when the wires are what help give the injector the power to do its job.

If you keep an eye out for these symptoms and tell them to the mechanic when you bring your vehicle in, it will help them narrow down what the problem might be so that they can fix it more efficiently.

  • Misfires: A misfire is what happens when you are driving down the road and the engine isn’t getting enough fuel or oxygen to run smoothly. You may hear a popping sound or feel a hesitation as you’re driving. With bigger engines such as in the Duramax, this may be harder to detect. Typically, the check engine light will come on on the dashboard if the vehicle is experiencing misfires.
  • Rough idling: As you might expect, this is when your truck shakes due to engine sputtering while you’re idle. It seems like the engine might stall each time you stop. This symptom can be caused by several different engine problems, so just because you’re experiencing rough idling doesn’t automatically mean that the fuel injector is the issue.
  • Check engine light: The check engine light should come on any time your vehicle’s engine is having problems, whether that’s something to do with the engine itself or any of the various components that work together to make sure the engine runs smoothly. This includes the fuel injectors. If your dashboard warning light illuminates for your engine, bring it to us for a full inspection.
  • Poor fuel economy: One of the most common symptoms of almost any vehicle problem is poor fuel efficiency, but it’s particularly notable when it comes to fuel-related problems. The fuel injectors are what help regulate how much fuel goes into the engine, so if something is wrong with the fuel injector, the engine may be receiving too much fuel or not enough. Either way, this means that you may end up going to the gas pump more often, since the engine won’t be running at its maximum efficiency.
  • Problems starting the truck: If everything in your truck is working properly, the engine should start as soon as you operate the ignition. If you have to try a couple of times before it starts or if it refuses to start at all, that’s a sign that the issue may be a problem with a fuel injector. Like many of the other examples on this list, however, it can also be a symptom of several other things.

Diesel Pickup Pros to Troubleshoot Injector Harness Chafing

A vehicle’s engine is a complex, interconnected GMC Duramax Injector Harness Chafing Fix web of components that all need to be working perfectly for the engine to be at its best. That’s why it’s important to come to our professionals at Diesel Pickup Pros. We are conveniently located for clients in Floyds Knobs, Georgetown, Jeffersonville, or New Albany, Indiana as well as for those in or near our other location in Louisville, Kentucky. Call us today.

* GMC Ext Duramax image credit goes to: Reimphoto.

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