GM Genuine Parts Piston
OE
Pack of 1

GM Genuine Parts Piston

GM Part #24585028

ACDelco Part #24585028

MSRP$346.29*

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

  • Compresses fuel and air mixture in a cylinder wall for ignition by spark plug
  • Converts up and down motion of piston to rotating crankshaft motion
  • Moves up and down inside cylinder walls

Pack of 1

About this product

GM Genuine Parts Engine Pistons are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These engine pistons compress a fuel and air mixture inside the cylinder wall which allows ignition by the spark plug.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

  • Compresses fuel and air mixture in a cylinder wall for ignition by spark plug
  • Converts up and down motion of piston to rotating crankshaft motion
  • Moves up and down inside cylinder walls
  • 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
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Ring Outside Diameter3.7 in / 94 mm
Oil Ring Thickness0.07 in / 2 mm
Second Compression Ring Thickness0.05 in / 1.5 mm
ClassificationOE
Cylinder Bore Diameter3.7 in / 94 mm
Ring Inside Diameter3.42 in / 87 mm
Piston Pin Inside Diameter0.66 in / 17 mm
Skirt Length1.84 in / 46.93 mm
Oil Spacer Ring Thickness0.01 in / 0.46 mm
OversizedNo
Assembly Lubricant IncludedNo
Piston MaterialAluminum
Skirt TypePartial
Piston Pin MaterialSteel
Piston Head TypeDome
Ring MaterialSpring Steel
Grade TypeStandard Replacement
Piston Inside Diameter2.04 in / 54 mm
Piston Pin Incorporated BearingsYes
Top Compression Ring Thickness0.07 in / 1.91 mm
Piston Pin Outside Diameter1.25 in / 32 mm
Piston Pin Length2.95 in / 75.06 mm
Piston Outside Diameter3.66 in / 93.2 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 an engine piston, make sure it is the correct fit for your vehicle

  • Keep oil changed and level full for proper lubrication
  • Have engine serviced if check engine light comes on
  • Have engine checked or serviced if internal noise appears
  • Change oil filter with every oil change
  • Regularly inspect engine pistons for signs of damage or wear, and replace them if signs of damage are found
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  • Low compression readings
  • Poor engine performance
  • Excessive smoke out of exhaust from worn piston rings
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ModelBody StyleTrimYear(s)
CanyonAT4, All Terrain, Denali, Elevation, SLE, SLT2016, 2017, 2018, 2019, 2020, 2021, 2022
Savana 25002017, 2018, 2019, 2020, 2021, 2022
Savana 35002017, 2018, 2019, 2020, 2021, 2022

Frequently Asked Questions

Yes. Always consult the Vehicle Owner's Manual or an expert technician before making any repairs or adjustments.

The piston is attached to a connecting rod on one end and the crankshaft on the other end with a bearing and bearing cap.

No, you need to get the right piston for your cylinder bore along with correct piston rings.

Yes, it will cause the piston rings to score the cylinder walls and possibly crack piston or connecting rod from excessive heat or side to side movement.