ACDelco GM Original Equipment Air Filter
OE
Pack of 1

ACDelco GM Original Equipment Air Filter

GM Part #20857930

ACDelco Part #A3178C

MSRP$75.04*

ACDelco GM Original Equipment Engine Air Filters are designed, engineered, and tested to rigorous standards, and are backed by General Motors.

  • Essential for daily driving through dusty or urban environments
  • Prevents abrasive particles from causing premature cylinder wear
  • Works alongside the intake manifold to regulate air volume

Pack of 1

About this product

ACDelco GM Original Equipment Engine Air Filters are designed, engineered, and tested to rigorous standards, and are backed by General Motors. An engine air filter is a vital maintenance component designed to keep your motor breathing easily by blocking dirt, dust, and abrasive particles from entering the intake manifold. If you are experiencing sluggish vehicle acceleration or rough idling, replacing a clogged filter restores unrestricted clean airflow and helps maintain the correct air-to-fuel ratio for efficient combustion. These filters have a tight seal that helps keep unfiltered air from entering your vehicle's passenger cabin before trapping airborne particles which protects sensitive mass airflow sensors from dust buildup and reduces the risk of unexpected misfires. Additionally, the advanced media within the filter is designed for minimal airflow restriction and to help enhance engine performance and efficiency, making them an essential component for daily driving through dusty urban environments or unpaved rural roads. ACDelco GM Original Equipment parts are the true OE parts installed during the production or validated by General Motors for GM vehicles.

Warning WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

  • Essential for daily driving through dusty or urban environments
  • Prevents abrasive particles from causing premature cylinder wear
  • Works alongside the intake manifold to regulate air volume
  • Helps keep unfiltered air from enterting combustion chamber with tight seals
  • Keeps pollutants from entering the engine with advanced filter media technology
  • GM engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
  • Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type
  • GM regularly updates production and service part designs to integrate new materials and technologies

Flanged EndNo
Neck FlangeNo
ClassificationOE
Gasket Thickness0.40 in / 10.25 mm
Height1.7 in / 43 mm
Side B Length2.7 in / 69.4 mm
Side D Length5.4 in / 136.3 mm
Side C Length10.8 in / 274.9 mm
Side E Length11 in / 280 mm
Side A Length12.3 in / 313 mm
ShapePentagon

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.

Signs of wear for an engine air filter include but are not limited to:

  • Reduced fuel economy
  • Reduced engine peak power

ModelBody StyleTrimYear(s)
ATSSedanBase, Luxury, Performance, Premium, Premium Luxury, Premium Performance2013, 2014, 2015, 2016, 2017, 2018, 2019
CTSBase, Luxury, Performance, Premium, Premium Luxury2014, 2015, 2016, 2017, 2018, 2019