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GM Genuine Parts Vacuum Pump Assembly
OE
Pack of 1

GM Genuine Parts Vacuum Pump Assembly

GM Part #55495381

ACDelco Part #55495381

MSRP$112.66*

GM Genuine Parts Vacuum Pumps are designed, engineered, and tested to rigorous standards, and are backed by General Motors.

  • Helps prevent the effects of engine blow-by
  • Assists in minimizing premature oil contamination
  • Operates blower air direction controls for A/C and heat

Pack of 1

About this product

GM Genuine Parts Vacuum Pumps are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These vacuum pumps provide a source of vacuum power for emission controls, and may be electrically or mechanically operated, depending on vehicle application. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Warning WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

  • Helps prevent the effects of engine blow-by
  • Assists in minimizing premature oil contamination
  • Operates blower air direction controls for A/C and heat
  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
  • GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
  • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
  • GM regularly updates production and service part designs to integrate new materials and technologies

Product Specifications

Mounting Hardware IncludedNo
Gasket Or Seal IncludedYes
Port Quantity1
ClassificationOE
Inlet Port Outside Diameter0.2 in / 5.08 mm
Inlet Port Inside Diameter0.11 in / 2.79 mm
TypeMechanical
Drive TypeGear

24 Months/Unlimited Miles Limited Warranty for Parts (plus Labor if installed by a GM dealer)

Please visit our warranty page on Gmparts.com for full warranty details.

Good Maintenance Practices:

  • Inspect belts if your pump is belt-driven.
  • Check all vacuum hoses for leaks.

ModelBody StyleTrimYear(s)
Encore GXPreferred2020, 2021, 2022, 2023, 2024, 2025
EnvistaAvenir, Preferred, Sport Touring2024, 2025, 2026

Frequently Asked Questions

Yes. If your climate experiences temperatures below freezing, a vacuum pump can freeze if moisture enters the pump.