Common Fuel Pump Problems For The GMC Sierra

If you have a GMC Sierra, odds are you’ll experience issues with your fuel pump at some point. Most times, when a fuel pump fails, it it has simply worn out. In this post, you can learn how to maximize the lifespan of your fuel pump. Below is a list of common symptoms related to GMC Sierra fuel pumps when they begin to fail. We’ll also provide some diagnostic tips, repair info, recommended replacement parts, and other background information.

GMC Sierra Fuel Pump Failure Symptoms

• Whining or grinding noises from the fuel tank
• Engine is low on power or stumbles during acceleration
• Rough starting and idle
• Less top-end power

GMC Sierra Fuel Pump Diagnosis And Repair Tips

Whenever you’re working around fuel lines, it’s important to know this system uses pressure to help move fuel through the fuel lines. Before you begin working on the fuel pump or fuel lines on your vehicle, it is essential to keep yourself safe. One way to do this is to depressurize the fuel system by simply removing your fuel cap. Always disconnect the battery before starting the job, so there is no power running through the vehicle or pump during the replacement. When pulling the primary fuel line off of the pump, keep a rag over the connection to limit where fuel can spray. Always work in a well-ventilated area. And, of course, make sure there are no sources of ignition near your work area.

Replacing the fuel pump on your GMC Sierra is fairly easy. The hardest part of the job is lowering the fuel tank. This may require a helper. Before dropping the tank, you will first have to disconnect the fuel filler hose and vent tube. The fuel pump sits on the topside of the tank. As you are disconnecting the fuel pump, remember to check the condition of the wiring connectors. If these are corroded, you should replace them.

One other helpful hint is to start with as little fuel in the tank as possible. This will help make the tank much lighter and easier to lower. If you’d like to know more about when to replace your fuel pump, check out this post, or download our Fuel Pump Troubleshooting Guide here.

Recommended Replacement Fuel Pump Parts For The GMC Sierra

Why Do GMC Sierras Have Fuel Pump Problems?

Most vehicles will develop fuel pump problems as they get into higher mileage. In most cases, fuel pumps can last up to 100,000 – 150,000 miles before needing replacement. If you’re experiencing fuel pump issues before the 100,000-mile mark, it may be an electrical issue rather than an issue with the fuel pump issue itself.

When it comes to replacement GMC parts for your shop or business, be sure to keep GMB parts in mind. With locations across the U.S., Asia, and Europe, we’re sure to have your parts shipped quickly and efficiently. You can find our products page here, or contact us here.