GM Genuine Parts Cylinder Head Gasket
OE
Pack of 1

GM Genuine Parts Cylinder Head Gasket

GM Part #55486594

ACDelco Part #55486594

MSRP$30.61*

GM Genuine Parts Engine Cylinder Head Gaskets are designed, engineered, and tested to rigorous standards, and are backed by General Motors.

  • Helps seal internal combustion process
  • Helps keep coolant and oil seperate
  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)

Pack of 1

About this product

GM Genuine Parts Engine Cylinder Head Gaskets are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These gaskets help seal in the internal combustion process and keeps coolant and oil separate as they travel from the engine block through the cylinder head. They are compressed between the cylinder head and engine block.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 seal internal combustion process
  • Helps keep coolant and oil seperate
  • 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

ClassificationOE
Cylinder Bore Diameter3.31 in / 84.2 mm
Face Width18.76 in / 476.43 mm
Thickness0.09 in / 2.21 mm
MaterialSteel Brass

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 an engine cylinder head gaskets, make sure it is the correct fit for your vehicle.

  • Keep coolant level full to help prevent overheating of engine.
  • Keep engine oil changed and level full.
  • Regularly inspect engine cylinder head gaskets for signs of damage or wear and replace them if signs of damage are found.

Signs of wear for engine cylinder head gaskets include but are not limited to:

  • Low engine coolant
  • Loss of engine performance
  • Oil or coolant entering cylinders

ModelBody StyleTrimYear(s)
Envision2021, 2022, 2023, 2024, 2025, 2026

Frequently Asked Questions

Consult product information for proper torque.

Yes. Consult with product information or repair manual for proper sequence.