GM Genuine Parts Engine Piston
OE
Pack of 1

GM Genuine Parts Engine Piston

GM Part #55488406

ACDelco Part #55488406

MSRP$69.41*

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

Top Compression Ring Thickness0.05 in / 1.2 mm
Oil Ring Thickness0.01 in / 0.31 mm
ClassificationOE
Oil Spacer Ring Thickness0.01 in / 0.2 mm
Second Compression Ring Thickness0.04 in / 1 mm
Piston Pin Length1.89 in / 47.9 mm
Piston Pin Outside Diameter0.83 in / 21 mm
Piston Outside Diameter3.27 in / 83 mm
Ring Outside Diameter3.27 in / 82.95 mm
Piston Pin Inside Diameter0.46 in / 11.8 mm
Skirt Length1.89 in / 48.08 mm
Ring Inside Diameter3.06 in / 77.6 mm
OversizedNo
Piston Pin Incorporated BearingsNo
Skirt TypePartial
Assembly Lubricant IncludedNo
Piston Head TypeBowl

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)
AcadiaDenali, SLE, SLT2020, 2021
Terrain2021