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2018 GMC Sierra Fuel Pump: Common Problems And Diagnoses

2018 GMC Sierra Fuel Pump

A failed or damaged 2018 GMC Sierra fuel pump could result in the following problems:

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  • Difficulty starting
  • Engine sputtering
  • Loss of power
  • Whining noises
  • Reduction in fuel efficiency

The 2018 GMC Sierra has many amazing features incorporating reliable performance and incredible design. Regardless of these added features to this vehicle, reported concerns about problems with the fuel pump have been raised.

Understanding these problems help current owners and future shoppers of the used 2018 GMC Sierra look for problems that might cause a lot of money if not addressed as soon as possible.

This article provides detailed guidance to help you understand the main features of the 2018 GMC Sierra fuel pump and get familiar with the common problems you might encounter. It also explains to you the expected repair options and repair costs.

2018 GMC Sierra fuel pump overview

Before we dive into the details about the 2018 GMC Sierra fuel pump problems, it is essential for you, as a current driver, to understand the main features of this pump so you know what exactly could go wrong and when to expect the troubles.


As the name suggests, the fuel pump is responsible for pumping fuel from the fuel tank to the different components within the fuel system. When this pump fails, the vehicle will not operate because the fuel will not reach the engine, and no power will be generated.

How To Tell If Your Car Has a Bad Fuel Pump

Common reported problems and potential solutions about the 2018 GMC fuel pump.

Since the fuel pump is a critical component in the 2018 GMC Sierra and any vehicle, understanding the expected problems within this component is very important to avoid dealing with sudden car shutdowns without preparations.

The following list provides you with the five most common issues with the 2018 GMC fuel pump:

1-    Trouble starting

The first and most common issue you'll encounter when your 2018 GMC fuel pump fails is trouble starting. This problem will be minor initially, but if you ignore it for a long time, you'll find that you can't start a vehicle.

Remember that starting problems are linked to many different failures in any vehicle. For example, it could be a simple issue in your starter motor or problems with the battery. Therefore, you cannot conclude immediately that the vehicle is suffering from a failed fuel pump just by dealing with starting issues.

2-    Engine sputtering

Another typical issue you will encounter when having a problem with the 2018 GMC Sierra fuel pump is trouble with engine sputtering.

Remember that the fuel pump is responsible for pumping any fuel to the engine, and when it's not operating properly,  it will deliver some fuel one time, but the other time it might not. As a result, you'll see that the engine is sputtering and cannot generate a continuous energy supply to get your vehicle going.

When the engine deals with such a problem, it could easily put your life at risk, especially if you're driving at highway speed or if there is a lot of traffic around you. Therefore, whenever you notice any engine sputtering, whether related to the fuel pump in your 2018 GMC CR or not, you must address it immediately.

3-    Loss of power

Depending on the fuel pump's amount of failure, you might notice that you have 2018 GMC Sierra is going to lose power. This happens suddenly without any preparation. It could be very dangerous, especially if you're not in a bus-driving environment.

Again, the loss of power is very general and common, and it can be very hard to determine whether it's related to the fuel pump without discussing it with your mechanic. Therefore, anytime you notice a continuous loss of power, please discuss it with your mechanic and have him take a quick look at the vehicle.

4-    Whining noises

In general, automotive experts recommend never ignoring any noises coming from the vehicle. Whether these are clunking or knocking or potentially whining noises, the problem must be addressed; otherwise, the repair costs can be very high.

A very common issue you'll notice when you're 2018 GMC Sierra fuel pump fails is a whining nose. This noise might start to be very quiet, but at some point, it can get very loud when the pump is suffering and unable to pump the fuel to the engine.

5-    Reduction in fuel efficiency

When your vehicle deals with all the four previously mentioned problems with the fuel pump, you'll notice that the vehicle will lose efficiency completely, and that's why you don't want to deal with that because it will cost you a lot of money down the road.

In other words, if you think that waiting until you fix the fuel pump for some time helps you save money, you should think about it in the long term and think about how much fuel you're burning without using it and without generating the required energy.

GMC Engine Problems

How much does it cost to fix a 2018 GMC Sierra fuel pump?

If you encountered a complete failure in your 2018 GMC Sierra fuel pump cover, place it. The range of repair costs can be very big, especially if you don't know exactly what's wrong with the fuel pump. According to experts, the fuel pump repair cost should range from $220 to $1062.

Remember that you must include the parts' labor and repair costs. This can make things very different if you're planning to replace your fuel pump at a dealership versus at an independent shop because labor costs are typically cheaper at the independent shop.

It's also critical to remember that you don't want to only focus on money when it comes to fixing this critical component in your 2018 GMC Sierra. This is because going with cheaper labor that doesn't have the required experience can result in problems that could introduce significant labor and repair costs.

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How to prevent the 2018 GMC Sierra fuel pump failures?

Before you even start dealing with the 2018 GMC Sierra fuel pump issues, there are some recommendations by automotive experts to help you extend the lifetime of this fuel pump and delay the problems as much as possible.

Let's take a look below:

·         Keep up with regular maintenance

Experts always recommend that you keep up with regular maintenance. This is because the vehicle is designed in a way that needs some inspections and maintenance between now and then; if you ignore those inspections and maintenance, you can easily deal with early problems your vehicle is not ready for.

For example, the vehicle owner's manual will provide some conditions about how often you should change the oil, inspect the different components, and flush certain components from dirty fluids.

Take a look at the vehicle owner's manual and see if there are any recommendations for things you have to do for the fuel pump. For example, you might have some exact recommendations about what fuel to use to avoid failures in the overall fuel system, including the fuel pump.

·         Choose the right fuel

Since the manual will have the right exact recommendations for what fuel to use, you must stick with this type of you or use a slightly higher quality fuel. You don't want to deal with problems that could introduce contaminants and dirt to your fuel pump.

Going with cheaper fuel might help your short-term to s on money, but in the long term, it can lead to some contaminants and other foreign elements getting into the pump that could stress it out and reduce its lifespan.

·         Inspect the pump regularly

Finally, it is very important for you as a driver to keep up with inspecting all the different components in your car, whether mentioned in the vehicle owner's manual or not. In other words, if the manual does not specify how often you should inspect the fuel pump, it doesn't mean you don't need to look at it.

A good time to look at the pump is based on what your mechanic recommends, but also, if you notice any minor symptoms indicating some fuel pump failures, that could be a perfect time for you to inspect it without delaying this.

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2018 GMC Sierra fuel pump: Final Thoughts

The fuel pump is one of the most critical components in the 2018 GMC Sierra, and unfortunately, there have been some race concerns about some problems with this component in this vehicle. Therefore, it is very important for you as a driver to understand what problems you might encounter, how to fix them, and the expected repair costs.

This article provides all this important information and helps you determine what to expect when the 2018 GMCR fuel pump fails. Once this happens, you have to consult the mechanic as soon as possible to have him either fix the fuel pump or replace it when necessary.

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