GM Genuine Parts Engine Block Core Hole Plug
OE
Pack of 1

GM Genuine Parts Engine Block Core Hole Plug

GM Part #94580068

MSRP$10.35*

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

  • Seals engine coolant passages
  • Helps prevent fluid leaks from engine
  • Helps prevent your engine block from cracking due to frozen water expanding inside

Pack of 1

About this product

GM Genuine Parts Engine Core Plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These core plugs, also referred to as freeze plugs, are meant to pop out of the engine when water begins to freeze inside the engine. When these plugs pop out, they attempt to help prevent your engine block from cracking.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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  • Seals engine coolant passages
  • Helps prevent fluid leaks from engine
  • Helps prevent your engine block from cracking due to frozen water expanding inside
  • Made from galvanized steel
  • 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

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 core plug, make sure it is the correct fit for your vehicle.

  • Use recommended coolant to prevent corrosion.
  • Keep fluid levels full.
  • Keep coolant tested to help prevent freezing in frigid temperatures.
  • Be sure to always have antifreeze inside the cooling system to help prevent expansion plugs from rusting.
  • Regularly inspect engine core plug for signs of damage or wear and replace them if signs of damage are found.

Signs of wear for engine core plugs include but are not limited to:

  • Low coolant level Engine overheating
  • Wet spots under engine
  • Coolant leaks
  • Cracked engine block

ModelBody StyleTrimYear(s)
AveoHatchbackBase, LS, LT2004, 2005, 2006, 2007, 2008
AveoSedanBase, LS, LT2004, 2005, 2006, 2007, 2008
Aveo5LS2007, 2008
OptraHatchbackBase, LS, LT2004, 2005, 2006, 2007
OptraSedanBase, LS, LT2004, 2005, 2006, 2007

Frequently Asked Questions

Any block casts with coolant jackets have holes that need core plugs.

No, core plugs are more effective with antifreeze inside the cooling system. Without the additional help of the antifreeze, the engine block may still crack from the expanded frozen water.