Common Fuel Pump Problems For The Chevy Silverado
If you have a Chevy Silverado, you’ll more-than-likely experience issues with the fuel pump at some point. Below you’ll find a list of common symptoms related to fuel pump failure. We’ll also provide some diagnostic tips, repair info, recommended replacement parts, and some other background information. If you’d like some tips on how to properly install a new fuel pump, check out this recent blog.
Fuel Pumps 101
The fuel pump functions as an electric motor that operates an impeller at high speeds to pressurize fuel and distribute it to the injectors. The electric motor is kept cool by the fuel in the tank. Maintaining the fuel level above ¼ of a tank at all times is advantageous to extend the fuel pump’s lifespan and decrease moisture buildup in the tank. This is particularly important during the winter season when warmer fuel temperatures can shorten the pump’s lifespan. To prevent condensation, it is recommended to store vehicles with a full tank for an extended period.
When troubleshooting Fuel System Problems
There are key important considerations to keep in mind when troubleshooting fuel system problems. To diagnose issues with a vehicle’s fuel system, it’s important to conduct a fuel pressure check while the engine is running. Low fuel pressure may indicate a faulty fuel pressure regulator. If the engine fails to start, it’s crucial to examine all electrical connections to ensure that the fuel pump is receiving the necessary current. If you need more specific help diagnosing fuel pump problems, download our Fuel Pump Troubleshooting Guide here.
Fuel Pump Failure Symptoms
The symptoms listed below can all be caused by inadequate fuel supply to the engine:
- Rough starts or rough idle
- Engine sputtering during acceleration
- Loss of power output
- Stumbling at higher RPMs
- Unable to maintain highway speeds
- Louder than normal whining or humming coming from the fuel tank
Fuel Pump Diagnosis And Repair Tips
Be sure before you begin any work on your Silverado fuel pump that you start with as little fuel in the tank as possible. This will make the tank lighter and easier to lower. Also, be sure you do the work in a well-ventilated area where the fuel fumes will easily dissipate.
Safely disconnect the battery, and remove the fuel cap on your gas tank to depressurize the fuel system.
Next comes the task of dropping the tank to allow access to the pump – this may require a mechanical helper or an extra set of hands. Once you access the pump, disconnect the wiring and fuel lines from the pump.
Remove the old pump from the tank, and reverse the steps listed above to reinstall the new fuel pump.
Recommended Replacement Silverado Fuel Pumps
Why Do Chevy Silverados Have Fuel Pump Issues?
Fuel pump issues are rare, but they do wear out. Modern fuel pumps should last up to about 150,000 miles. The fuel pumps in Silverados are similar to those used in many other vehicles and are equally reliable. If you notice any of the symptoms listed above, the fuel pump may be the issue. You should also check the ignition system, as it can cause similar systems.
If you’ve determined that you need a fuel pump, keep GMB in mind. We manufacture parts for OEMs and the aftermarket. We have more than 70 years of experience manufacturing fuel pumps and other automotive components. With locations across the US, Asia, and Europe, we can get you the parts you need quickly. You can find our product page here, or you can contact us here.
Sign up here to get the latest news
and updates on all things GMB.