GM Genuine Parts Engine Oil Pump
OE
Pack of 1

GM Genuine Parts Engine Oil Pump

GM Part #55503981

ACDelco Part #55503981

MSRP$150.39*

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

  • Maintains engine oil pressure
  • Designed to help extend engine life
  • Reliable and dependable performance

Pack of 1

About this product

GM Genuine Parts Engine Oil Pumps are designed, engineered, and tested to rigorous standards, and are backed by General Motors. The engine oil pump is resposbile for maintaining the engine's oil pressure as well as pushing the oil through the engine. 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).

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  • Maintains engine oil pressure
  • Designed to help extend engine life
  • Reliable and dependable performance
  • 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

Pick Up Tube Diameter0.89 in / 22.5 mm
Solenoid IncludedNo
Oil Pump TypeRotary
Width5 in / 127 mm
ClassificationOE
Height3.9 in / 99 mm
Mounting Hole Diameter0.24 in / 6 mm
Housing MaterialAluminum
Mounting Hole Quantity3
Gasket Or Seal IncludedYes
Pick Up Screen Diameter2.52 in / 64 mm

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.

Before purchasing and installing a engine oil pump, make sure it is the correct fit for your vehicle

  • Keep oil changed and level full for proper lubrication
  • Use proper weight and type oil
  • Replace oil if any sign of contamination present
  • Regularly inspect engine oil pump for signs of damage or wear, and replace them if signs of damage are found

Signs of wear for engine oil pumps include but are not limited to:

  • Loss of oil pressure
  • Increased engine temperature from increased friction caused by lack of lubrication
  • Engine noise from lack of lubrication

ModelBody StyleTrimYear(s)
TrailblazerL, LS, LT2021, 2022, 2023, 2024, 2025
TraxACTIV, LS, LT, RS2024, 2025

Frequently Asked Questions

A: Yes. Always consult the Vehicle Owner’s manual or an expert technician before making any repairs or adjustments.

A: Milky or discolored oil

A: Yes loss of oil pressure causes friction and damage to engine components

A: Check owner’s manual or consult a technician for proper amount of oil