Shop Parts & Accessories

Shop Aftermarket

Shop Clearance

Hydraulic Valve Adjuster - ACDelco (HL129)

- HL129

  • Sale Price: $16.62
Ships To
  • Sale Price: $16.62

Review Fitment & Product Details

Details

  • Brand:

     Parts

  • SKU:

    HL129

  • Other Names:

    12686787

  • Description: 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. ⚠ WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
  • Condition: New
Ships To

Pricing is valid online only and may vary in your local store

Manufacturer Warranty Minimum of 12 Months
Guaranteed Fitment ALWAYS - When VIN is provided
Shop with Confidence Your information is safe
In-House Experts We know our products

Vehicle Fitment

Vehicle Fitment

No application/vehicle fitment information available for this product
Vehicle Fitment
Year Make Model Body & Trim Engine & Transmission
( more fitments)
No fitment data available

Key Product Information

Additional Information

Brand GM Genuine Parts
FAQ - Answer 1 No. You should get the lifter that is designed for your camshaft.
FAQ - Answer 2 Yes. A stuck lifter will prevent the valve from opening or closing, causing internal engine problems.
FAQ - Question 1 Can I put any type of lifter in my engine?
FAQ - Question 2 Can a stuck lifter cause engine problems?
Features & Benefits - Bullet 1 Adjusts the valves on your vehicle's engine for proper performance
Features & Benefits - Bullet 2 GM-recommended replacement part for your GM vehicle's original factory component
Features & Benefits - Bullet 3 Offering the quality, reliability, and durability of GM OE
Features & Benefits - Bullet 4 Manufactured to GM OE specification for fit, form, and function
Good Maintenance Practices - Section 1 - Bullet 1 Before purchasing and installing an engine valve lifter, make sure it is the correct size and fit for your vehicle.
Good Maintenance Practices - Section 1 - Bullet 2 Keep the coolant level full and do not allow the engine to overheat - excessive heat could cause the lifter to expand and stick.
Good Maintenance Practices - Section 1 - Bullet 3 Keep engine oil level full.
Good Maintenance Practices - Section 1 - Bullet 4 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.
Good Maintenance Practices - Section 1 - Bullet 5 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.
Good Maintenance Practices - Section 1 - Bullet 6 Have your vehicle inspected as soon as possible if the 'Service Engine Soon' light illuminates.
Good Maintenance Practices - Section 1 - Bullet 7 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.
Good Maintenance Practices - Section 1 - Bullet 8 Regularly inspect engine valve lifter for signs of damage or wear, and replace them if signs of damage are found.
Lifter Type Hydraulic OHC
Material Steel
Maximum Outside Diameter 0.472
12
Roller No
Signs of Wear & Troubleshooting - Section 1 - Bullet 1 Tapping noises from the engine
Signs of Wear & Troubleshooting - Section 1 - Bullet 2 Loss of power
Signs of Wear & Troubleshooting - Section 1 - Bullet 3 Engine misfire
Signs of Wear & Troubleshooting - Section 1 - Bullet 4 Poor engine performance
Signs of Wear & Troubleshooting - Section 1 - Bullet 5 Excessive noise in the valve train
Signs of Wear & Troubleshooting - Section 1 - Header Signs of wear for engine valve lifters include but are not limited to:

Features and Benefits

Interchange

Interchange

Product Reviews

Product Reviews

Brand

ACDelco

 

 

Store

AutoNationParts.com

Genuine OEM & Premium Aftermarket Replacement Parts Online

Shop high-quality OEM and aftermarket components online at AutoNationParts.com. We provide reliable replacement parts, factory maintenance essentials, and specialized hardware performance upgrades for nearly every major vehicle make and model on the road.

Currently viewing detailed specifications and pricing for Hydraulic Valve Adjuster (SKU: HL129). You can explore our master catalog of auto parts categories, or jump directly into core high-demand vehicle infrastructure systems below:

With strategic nationwide distribution hubs, orders for Hydraulic Valve Adjuster and related catalog items process immediately and ship out in 1–2 business days. Learn more about our fast domestic delivery windows via our shipping policy.


Verifying Fitment for Hydraulic Valve Adjuster

To guarantee 100% complete compatibility before checking out, ensure you cross-reference your vehicle's unique 17-digit VIN (Vehicle Identification Number) or enter your exact manufacturer part number. Because automotive engineering frameworks shift across model years and specific engine packages, confirming your mechanical alignment ensures a flawless installation.

Explore related systems in our database: Brake Parts | Filters | Suspension


OEM Performance vs. Premium Aftermarket Alternatives

Whether you choose an OEM (Original Equipment Manufacturer) part or a trusted third-party alternative, AutoNation Parts ensures that your technical hardware fulfills rigorous road-testing and assembly standards.

  • OEM Inventory: Offers exact factory engineering specs, direct electrical or mechanical compatibility, and protects existing manufacturer warranties.
  • Aftermarket Options: Provides highly cost-effective, dependable solutions with wider availability across legacy vehicle models.

Browse our complete catalog pathway: OEM Auto Parts Collection | Aftermarket Alternatives


Fast Nationwide Shipping (1–2 Business Days)

We leverage a robust, interconnected network of regional U.S. fulfillment facilities to route your components via the most efficient transport channels, keeping vehicle downtime to an absolute minimum:

  • Chicago – Midwest logistics hub
  • Atlanta – Southeast distribution network
  • Houston – Central regional fulfillment
  • Los Angeles – West Coast shipping facility
  • Miami – East Coast distribution hub

Learn more: Shipping Information & Logistics Rates


Why Source Your Inventory from AutoNation Parts?

  • Extensive OEM and premium aftermarket parts in one centralized marketplace
  • Fast nationwide shipping with tracking transparency to reduce project downtime
  • Trusted automotive retailer dedicated to component precision and customer support
  • Secure encrypted checkout paired with verified real-time active inventory data
  • Catalog coverage spanning the majority of vehicle model configurations on the road

Shop AutoNation Parts Online Today


OEM & Aftermarket Auto Parts FAQ | AutoNation Parts

What are OEM auto parts?

OEM auto parts are original equipment components manufactured directly by the vehicle factory or licensed suppliers to match your vehicle’s original assembly specifications for an exact fit and flawless performance.

What are aftermarket auto parts?

Aftermarket auto parts are components produced by independent third-party manufacturers. They serve as highly affordable, readily available replacement options or heavy-duty performance upgrades.

How do I ensure Hydraulic Valve Adjuster fits my exact vehicle?

The fastest way to guarantee fitment for SKU HL129 is to use our advanced Search by Vehicle tool to isolate components by your unique 17-digit VIN, or filter results by selecting your year, make, model, and trim level.

Can I apply promotional discounts to routine maintenance orders?

Yes. For qualifying orders of common maintenance components such as engine filters, cabin air filters, ignition spark plugs, or fluids, you can enter promo code MAINT5SAVE at checkout to apply direct tiered savings.

How fast is shipping for auto parts online?

Most in-stock orders process and depart our distribution centers within 1–2 business days. We utilize multiple domestic regional hubs to route shipments via the most efficient paths possible.

Is it safe to buy auto parts online?

Yes. AutoNation Parts integrates secure checkout protocols, strict data encryption, and fully verified real-time warehouse inventory to make sure your online purchasing experience is secure and dependable.