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Fuel Pump and Sender Assembly ACDelco GM Original Equipment MU1611

Part Number: MU1611

Features:

  • Designed with guide rods to retain proper alignment while reducing pinching
  • Include a reservoir and jet pump to prevent fuel pump starvation when the fuel level is low
  • Most strainers are placed inside the module to help reduce the chance of puncture
  • Acetyl plastic for good high-alcohol fuel tolerance
  • Electrical connections are designed to help eliminate high resistance due to vehicle vibration
  • Designed for increased pump life and reduced fuel pump noise with regard to previous models
  • GM-recommended replacement part for your GM vehicles original factory component
  • Offering the quality, reliability, and durability of GM OE
  • Manufactured to GM OE specification for fit, form, and function

Description:

ACDelco GM Original Equipment Fuel Pump and Fuel Sender Assemblies are GM-recommended replacements for your vehicles original components, and consist of a fuel level sender, an electric fuel pump, and a jet pump. The jet pump maintains a consistent fuel level inside the internal fuel pump reservoir. These assemblies may be equipped with quiet Generation 4 turbine pumps with integral strainer socks. These original equipment fuel pump and fuel sender assemblies have been manufactured to fit your specific GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Tips

  • When you replace a fuel pump, its important to determine what caused the previous fuel pump to fail. Not diagnosing the problem can lead to more of the same in the future.
  • For proper operation and longevity, it is critical to have a clean fuel system. If there are any signs of contamination, follow the manufacturers service information to thoroughly clean the fuel system.
  • When replacing a fuel pump, you need to check for proper electrical connections, pressure, volume, and current. The specs that dont measure up require further investigation into the entire fuel system.
  • When servicing an electric fuel pump, always replace the strainer. Also, inspect the inline fuel filter for contamination, which could restrict proper fuel flow within the system.
  • Maintaining proper fuel levels aids in cooling the pump, which, in turn, adds to its longevity. Its important to remember that constantly running your vehicle with a near empty fuel tank can cause the pump to fail.

FAQ

  • Do I need to buy a specific version of this pump to fit my particular vehicle?
  • Yes. Refer to a parts catalog for specific applications.
  • Are there benefits to replacing my fuel pump with an original equipment fuel pump?
  • Yes. Original equipment fuel pumps have gone through the same rigorous testing and meet or exceed the specifications of the production pump your vehicle was built with.
  • Will my fuel pump always exhibit warning signs if it is failing?
  • No. Noise, vibration, exhaust smoke, warning lights, hard starting, stalling, and hesitation can all be signs of a failing fuel pump. However, it is also possible that none of these signs could be present.
  • Are there ways to test my fuel pump to see if it is performing efficiently?
  • Yes. Inspecting fuel pressure and/or examining engine data and codes with a scan tool can help determine potential concerns.
  • Are there preventative measures I can take to help prevent/minimize fuel contamination that could damage my fuel pump?
  • Yes. It is good practice to refuel with high quality fuel from well known, high volume, trusted fuel stations whenever possible.
  • Could special tools be required for fuel pump installation?
  • Yes. Special tools may be required, e.g., a wire connector crimper, fuel pressure gauge, and lock ring removal tool.

Troubleshooting

  • Fuel contamination is one of the top reasons for fuel pump failure. However, contamination has many other partners in crime that can help seize the functions of the fuel pump. Additive breakdowns, rust, scale, and even the delamination of the fuel tank liner can clog the pickup strainer or inline filter.
  • Issues with a fuel pump or sender can be caused by: internal electrical shorts, a sticking fuel tank float, and/or damaged or corroded electrical components.
  • Fuel pump signs of wear can include: poor engine starting characteristics, slow response when accelerating, intermittent power loss, excessive noise, vibration while driving, and/or fuel gauge reading incorrectly.
  • Make a service appointment if your vehicle shows any of the following symptoms (they can indicate a major issue with your fuel pump and/or fuel system): Service Engine Soon light is illuminated, improper engine idling, hesitation, or stalling, excessive exhaust smoke, abnormal engine noises, and/or noticeable fuel odors.

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