GM Genuine Parts Engine Piston
OE
Pack of 1

GM Genuine Parts Engine Piston

GM Part #55484852

ACDelco Part #55484852

MSRP$204.16*

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

  • 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

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. 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

  • 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

Assembly Lubricant IncludedYes
Piston MaterialAluminum Alloy
OversizedNo
Piston Pin Incorporated BearingsNo
Skirt TypePartial
Piston Pin MaterialSteel
Piston Head TypeDome
Skirt Length0.12 in / 3.04 mm
Second Compression Ring Thickness0.0472 in / 1.2 mm
Oil Spacer Ring Thickness0.0756 in / 1.92 mm
Piston Pin Inside Diameter0.5315 in / 13.5 mm
Piston Pin Outside Diameter0.8268 in / 21 mm
Piston Pin Length1.811 in / 46 mm
Piston Inside Diameter2.836 in / 72.03 mm
Ring Inside Diameter2.957 in / 75.1 mm
Piston Outside Diameter3.1681 in / 80.47 mm
Ring Outside Diameter3.1693 in / 80.5 mm
Cylinder Bore Diameter3.1696 in / 80.508 mm
Oil Ring Thickness0.0157 in / 0.4 mm
Top Compression Ring Thickness0.0472 in / 1.2 mm
ClassificationOE
Ring MaterialSteel

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.

ModelBody StyleTrimYear(s)
MalibuHybrid2016, 2017, 2018, 2019