Remanufactured GM 3.6L Left Cylinder Head 2004-2020

Please include your year make and model when ordering!

Description:
If you’re looking to restore your GM 3.6L engine to its original performance, our remanufactured GM 3.6L left cylinder head is the ideal replacement part. Manufactured to meet or exceed OEM standards, this cylinder head ensures a precise fit and smooth operation. It’s perfect for those in need of a reliable solution, whether you’re replacing a damaged head or completing an engine rebuild.

Our remanufactured GM left cylinder head is inspected and rigorously tested to guarantee optimal engine performance. With this quality part, your GM engine will run like new, providing the efficiency and reliability you expect from your vehicle. A core return is required for this purchase.

Important: Be sure to provide the casting number and the style of front camshaft cap (inside or outside thrust) when ordering to ensure you receive the correct cylinder head.

GM 3.6L Cylinder Head Fitment

2004–2011 (LY7 Engines, Castings 12581596 / 12581597 / 12600041 / 12600045)

Right Side Applications

• Buick Allure 2005–2008 (3.6L LY7, VIN 7)
• Saturn Aura 2007–2009 (3.6L LY7, VIN 7)
• Cadillac CTS 2004–2009 (3.6L LY7, VIN 7)
• Chevrolet Equinox 2008–2009 (3.6L LY7, VIN 7)
• Pontiac G6 2007–2009 (3.6L LY7, VIN 7)
• Pontiac G8 2008–2009 (3.6L LY7, VIN 7)
• Buick LaCrosse 2005–2008 (3.6L LY7, VIN 7)
• Chevrolet Malibu 2008–2012 (3.6L LY7, VIN 7)
• Buick Rendezvous 2004–2006 (3.6L LY7, VIN 7)
• Cadillac SRX 2004–2009 (3.6L LY7, VIN 7)
• Cadillac STS 2005–2007 (3.6L LY7, VIN 7)
• Pontiac Torrent 2008–2009 (3.6L LY7, VIN 7)
• Saturn Vue 2008–2010 (3.6L LY7, VIN 7)

Left Side Applications
(same models/years as above — casting 12581597 / 12600041)

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2008–2011 (LLT Direct Injection)

Right Side Applications

• Cadillac CTS 2008–2011 (3.6L LLT, VIN V/D)
• Cadillac STS 2008–2011 (3.6L LLT)
• Chevrolet Traverse 2009–2011 (3.6L)
• GMC Acadia 2009–2011 (3.6L)
• Buick Enclave 2009–2011 (3.6L)
• Saturn Outlook 2009–2010 (3.6L)
• Saturn Vue 2009 (3.6L, VIN B, LCS)
• Buick Allure / LaCrosse 2010–2011 (3.6L)
• Chevrolet Camaro 2010–2011 (3.6L)

Left Side Applications

• Same models/years as above

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2012–2020 (LFX Engines)

Right Side Applications

• Cadillac ATS 2013–2015 (3.6L, California NU5 / Federal NT7)
• Chevrolet Camaro 2012–2015 (3.6L)
• GMC Canyon 2015–2016 (3.6L)
• Chevrolet Caprice 2012–2017 (3.6L)
• Chevrolet Colorado 2015–2016 (3.6L)
• Cadillac CTS 2012–2015 (3.6L LFX)
• Chevrolet Equinox 2013–2017 (3.6L)
• Chevrolet Impala 2012–2020 (3.6L, VIN 1 & W styles)
• Buick LaCrosse 2012–2016 (3.6L, NU5 / NT7)
• Cadillac SRX 2012–2016 (3.6L)
• GMC Terrain 2013–2017 (3.6L)
• Cadillac XTS 2013–2019 (3.6L LFX)

Left Side Applications

• Same models/years as above

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Why Choose a Remanufactured Cylinder Head for Your GM 3.6L Engine?

Choosing our remanufactured GM 3.6L left cylinder head offers several advantages over traditional options:

• OEM Quality for GM Engines: Manufactured to exceed or match OEM specifications for superior reliability and performance.
• Rigorous Testing: Each cylinder head undergoes thorough testing to ensure it meets the highest quality standards.
• Affordable Solution: Get a reliable replacement at a fraction of the cost of a brand-new cylinder head.
• Easy Installation: Pre-tested and ready for installation, saving you time and effort during repairs.
• Correct Fitment for GM Engines: Be sure to provide your casting number and camshaft cap style to ensure the correct fit.

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Key Features of the Remanufactured GM 3.6L Left Cylinder Head

• Engine Compatibility: Designed specifically for GM 3.6L engines.
• Durability: Remanufactured to withstand the demands of your engine and provide long-lasting performance.
• Casting Number for Exact Fit: Don’t forget to provide the casting number for precise fitment.
• Camshaft Cap Style: Choose between inside or outside thrust camshaft cap for the right fit.
• High-Quality Remanufactured Part: Tested to meet or exceed OEM standards.
• Core Return Required

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Heavy Duty Parts Company – Core Returns Policy

Effective December 17, 2025

At Heavy Duty Parts Company, core returns are essential to our ability to provide high-quality, cost-effective cylinder heads. Returned cores supply critical components—such as keepers, springs, and retainers—that are vital to proper engine performance and allow us to maintain OEM-level quality.

No Upfront Core Charge

Unlike many suppliers, we do not charge a core fee upfront. Instead, we rely on customers to return their used cores within the required timeframe.

Core Return Requirements

• Cores are due within 30 days of the purchase date

• If a core is not returned within 60 days, the product warranty is void

• Unreturned cores will be charged as follows:

  • Cylinder heads under $600: $200 per unreturned core

  • Cylinder heads $600 and above: $400 per unreturned core

Customers needing additional time may contact us to request an extension. Approved extensions will prevent core charges from being applied.

Core Return Process

Cylinder heads are shipped with prepaid core return labels included in packets attached to the outside of each box. If labels are missing, customers should contact us for replacements prior to returning the core.

Core Eligibility

Some cylinder heads do not require a core return. In certain cases, core requirements may be waived at our discretion.

Why Core Returns Matter

• Reused core components help maintain OEM-quality standards

• Core returns allow us to keep pricing competitive

• Recycling cores supports sustainability by reducing waste and conserving resources

This policy applies to all purchases made on or after December 17, 2025.

Send Back All Components

To ensure the quality and integrity of our remanufacturing process, we ask that you return all components that were originally included with your new cylinder head. This includes items such as:

• Rocker arms
• Camshafts (if applicable)
• Any other hardware that came with your purchase

Easy & Free Core Return Process

• Each purchase includes a prepaid core return label in a plastic sleeve on the box.
• Simply pack your core with all included components, attach the label, and drop it off with the carrier—no extra cost to you.
• Returned cores undergo inspection and recycling, ensuring maximum efficiency.

Customer Partnership & Sustainability

By returning your core and its components, you help maintain a reliable supply chain, ensuring we can continue offering top-quality products at the best prices. This process not only benefits your wallet but also contributes to a greener and more efficient automotive industry.

We appreciate your support in keeping our business and the industry running smoothly!

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Order Your Remanufactured GM 3.6L Left Cylinder Head Today

Order your remanufactured GM 3.6L left cylinder head today and experience fast shipping and excellent customer service. At Heavy Duty Parts Company, we’re committed to providing high-quality parts at affordable prices.

Important: Be sure to specify the casting number and style of front camshaft cap (inside or outside thrust) for the right part.

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