GM Genuine Parts Hydraulic Valve Adjuster
OE
Pack of 8

GM Genuine Parts Hydraulic Valve Adjuster

GM Part #12686787

ACDelco Part #HL129

MSRP$193.84*

ACDelco GM Original Equipment Engine Valve Lifters automatically help maintain a 'zero' valve lash condition to help prevent valve train noise and unnecessary valve train component wear, and are GM-recommended replacements for your vehicle's original components.

  • Adjusts the valves on your vehicle's engine for proper performance
  • GM-recommended replacement part for your GM vehicle’s original factory component
  • Offering the quality, reliability, and durability of GM OE

Pack of 8

About this product

ACDelco GM Original Equipment Engine Valve Lifters automatically help maintain a 'zero' valve lash condition to help prevent valve train noise and unnecessary valve train component wear, and are GM-recommended replacements for your vehicle's original components. These original equipment valve lifters have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

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  • Adjusts the valves on your vehicle's engine for proper performance
  • GM-recommended replacement part for your GM vehicle’s original factory component
  • Offering the quality, reliability, and durability of GM OE
  • Manufactured to GM OE specification for fit, form, and function

Maximum Outside Diameter0.472 in / 12 mm
ClassificationOE
MaterialSteel
RollerNo

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.

Good Maintenance Practices:

  • Before purchasing and installing an engine valve lifter, make sure it is the correct size and fit for your vehicle.
  • Keep the coolant level full and do not allow the engine to overheat - excessive heat could cause the lifter to expand and stick.
  • Keep engine oil level full.
  • Be sure that flat non-roller lifters turn in their bores at least 45 degrees in 2 crankshaft revolutions, to help prevent camshaft lobe damage.
  • If a tapping sound occurs in the engine, have it checked - it could be a sign of a faulty lifter and lead to excessive damage to engine components.
  • Have your vehicle inspected as soon as possible if the 'Service Engine Soon’ light illuminates.
  • Have your vehicle inspected immediately if the 'Service Engine Soon’ light flashes rapidly, as this could indicate an engine misfire condition which may damage your engine and/or engine emission components.
  • Regularly inspect engine valve lifter for signs of damage or wear, and replace them if signs of damage are found.

Signs of wear for engine valve lifters include but are not limited to:

  • Tapping noises from the engine
  • Loss of power
  • Engine misfire
  • Poor engine performance
  • Excessive noise in the valve train

ModelBody StyleTrimYear(s)
ATSSedanBase, Luxury, Performance, Premium, Premium Luxury, Premium Performance, V2013, 2014, 2015, 2016, 2017, 2018, 2019
CT4V Blackwing2022, 2023, 2024, 2025, 2026
CT5Premium Luxury, V2020, 2021, 2022, 2023, 2024, 2025, 2026
CT6Base, Luxury, Platinum, Plug-In, Premium Luxury, Sport2016, 2017, 2018, 2019, 2020
CTSBase, Luxury, Performance, Premium, Premium Luxury, Vsport, Vsport Premium, Vsport Premium Luxury2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019

Frequently Asked Questions

No. You should get the lifter that is designed for your camshaft.

Yes. A stuck lifter will prevent the valve from opening or closing, causing internal engine problems.