GM Genuine Parts Cylinder Head
OE
Pack of 1

GM Genuine Parts Cylinder Head

GM Part #12677840

ACDelco Part #12677840

MSRP$820.81*

GM Genuine Parts Engine Cylinder Head Assemblies 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 Cylinder Head Assemblies 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

MaterialAluminum
Length15.99 in / 406.07 mm
ClassificationOE
Width8.14 in / 206.86 mm
Valve Stem Diameter0.281 in / 7.135 mm
Exhaust Valve Diameter1.56 in / 39.5 mm
Intake Valve Diameter1.93 in / 49 mm
Combustion Chamber Volume3.611 po³ / 59.18
Guide Plates IncludedNo
Head Casting Number12629344

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)
Express 25002018, 2019, 2020, 2021, 2022, 2023
Express 35002018, 2019, 2020, 2021, 2022, 2023
Silverado 15002014, 2015, 2016, 2017, 2018, 2019, 2020, 2021