
OE
Pack of 1
OE
Pack of 1
GM Genuine Parts Engine Piston
GM Part #55598380
ACDelco Part #55598380
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: 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
Ring MaterialSteel
Piston Outside Diameter3.1459 in / 79.905 mm
Cylinder Bore Diameter3.1476 in / 79.95 mm
Piston Pin Inside Diameter0.571 in / 14.5 mm
Piston Pin Outside Diameter1.142 in / 29 mm
Skirt Length1.8189 in / 46.2 mm
Piston Pin Length2.481 in / 63.01 mm
Ring Inside Diameter2.894 in / 73.5 mm
Piston Inside Diameter2.9724 in / 75.5 mm
Ring Outside Diameter3.137 in / 79.69 mm
Oil Ring Thickness0.079 in / 2 mm
Top Compression Ring Thickness0.059 in / 1.5 mm
Second Compression Ring Thickness0.059 in / 1.5 mm
ClassificationOE
Oil Spacer Ring Thickness0.079 in / 2 mm
OversizedYes
Piston Pin MaterialSteel
Skirt TypePartial
Piston Pin Incorporated BearingsNo
Piston MaterialAluminum Alloy
Assembly Lubricant IncludedNo
Piston Head TypeDish
Ring MaterialSteel
Cylinder Bore Diameter3.1476 in / 79.95 mm
Piston Pin Outside Diameter1.142 in / 29 mm
Piston Pin Length2.481 in / 63.01 mm
Piston Inside Diameter2.9724 in / 75.5 mm
Oil Ring Thickness0.079 in / 2 mm
Second Compression Ring Thickness0.059 in / 1.5 mm
Oil Spacer Ring Thickness0.079 in / 2 mm
Piston Pin MaterialSteel
Piston Pin Incorporated BearingsNo
Assembly Lubricant IncludedNo
Piston Outside Diameter3.1459 in / 79.905 mm
Piston Pin Inside Diameter0.571 in / 14.5 mm
Skirt Length1.8189 in / 46.2 mm
Ring Inside Diameter2.894 in / 73.5 mm
Ring Outside Diameter3.137 in / 79.69 mm
Top Compression Ring Thickness0.059 in / 1.5 mm
ClassificationOE
OversizedYes
Skirt TypePartial
Piston MaterialAluminum Alloy
Piston Head TypeDish
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.
