GM GENUINE PARTS 12675715 Crankshaft Balancer 808709480365

( Brand: Gm Genuine Parts ), ( Manufacturer Part Number: 12675715 ), ( UPC: 808709480365 ), ( Gtin: 00808709480365 )

Review GM GENUINE PARTS Crankshaft Balancer

The **GM 12675715 Crankshaft Balancer** is a precision-engineered, high-performance accessory designed specifically for General Motors vehicles equipped with the LS-series V8 engines, including models such as the Corvette, Camaro, and high-output applications like the LS7 or LS9. This critical component plays a vital role in maintaining optimal engine balance, reducing harmful vibrations, and enhancing overall drivetrain efficiency especially under high-stress conditions such as aggressive acceleration, heavy loads, or high-revving applications. Crafted from high-grade steel and machined to exacting tolerances, the balancer features a robust, durable construction that ensures longevity and reliability, even in demanding racing or performance driving scenarios. Its design incorporates a balanced flywheel-like structure, which helps mitigate torsional forces generated by the crankshaft, thereby reducing strain on the engine mounts, transmission, and drivetrain components. This not only improves ride comfort but also extends the lifespan of related parts by minimizing excessive wear and tear. The GM 12675715 is particularly well-suited for applications where engine modifications such as forced induction, supercharging, or high-performance camshafts have altered the natural balance of the crankshaft assembly. By integrating this balancer into the drivetrain, enthusiasts and professional mechanics can achieve a smoother, more refined power delivery while mitigating the risk of premature failure in critical components. Whether installed in a stock or heavily modified LS engine, this balancer serves as an essential upgrade for those seeking to maximize performance, durability, and drivability in their GM-powered vehicles.

**Pros and Cons of buying a GM 12675715 Crankshaft Balancer**

The GM 12675715 crankshaft balancer is a critical component for maintaining engine balance, particularly in older GM vehicles like the 350 or 400 cubic inch V8 engines. Below is a detailed breakdown of its advantages and disadvantages.

1. **Direct OEM Replacement** This part is an original equipment manufacturer (OEM) component, meaning it is designed to match the exact specifications of the engine it was originally installed in. This ensures proper fitment, performance, and compatibility with other engine parts.

2. **Reliability and Durability** GM s manufacturing standards generally ensure that OEM parts are built to last, reducing the risk of premature failure. The balancer is made from high-quality materials, which helps maintain engine smoothness and longevity.

3. **Prevents Vibration and Noise** A worn or damaged crankshaft balancer can cause excessive vibration, rattling, or even a knocking noise. Replacing it with a new OEM part restores proper balance, reducing these issues and improving drivability.

4. **Compatibility with Aftermarket Parts** Since this is an OEM part, it is more likely to work seamlessly with other aftermarket components, such as timing chains, harmonic balancers, or engine rebuild kits, without causing interference or fitment issues.

5. **Warranty Coverage** Purchasing directly from GM or an authorized dealer may include warranty protection, offering peace of mind in case of defects or premature failure.

6. **Maintains Engine Performance** A properly functioning crankshaft balancer helps reduce engine strain, improves fuel efficiency, and prevents potential damage to other engine components like the timing chain, bearings, or mounts.

7. **Easier Installation** Because it is an OEM part, it is designed to fit the engine bay layout perfectly, making installation straightforward for experienced DIYers or mechanics.

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1. **Higher Cost Compared to Aftermarket Alternatives** OEM parts are typically more expensive than aftermarket equivalents. While the quality may justify the price, budget-conscious buyers may opt for a reputable aftermarket balancer that offers similar performance at a lower cost.

2. **Limited Availability Outside Dealerships** Unlike aftermarket parts, which are widely available through online retailers, auto parts stores, and eBay, OEM GM parts may require purchasing through an authorized dealer or GM s official website. This can sometimes lead to longer wait times or shipping delays.

3. **Potential for Counterfeit Parts** When buying from third-party sellers (even online), there is a risk of receiving counterfeit or refurbished parts that do not meet OEM standards. Always verify the seller s reputation and authenticity before purchasing.

4. **Overkill for Some Applications** If the engine has already been heavily modified or rebuilt with aftermarket components, an OEM balancer may not offer any significant advantage over a high-quality aftermarket part. In such cases, aftermarket options could be just as effective while saving money.

5. **Mixed Quality in Refurbished OEM Parts** Some sellers offer "reconditioned" or "used" OEM parts, which may not be as reliable as new ones. Unless the part is explicitly stated to be new, there is a risk of purchasing a worn or damaged component.

6. **Installation Complexity** While the part itself is straightforward, removing and installing a crankshaft balancer may require disassembling parts of the engine, such as the timing cover or harmonic balancer. This can be time-consuming and may require specialized tools, especially for those without mechanical experience.

7. **Environmental and Ethical Concerns** Purchasing new OEM parts contributes to manufacturing waste. Some buyers may prefer aftermarket or remanufactured parts to reduce environmental impact, though this depends on personal values.

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The GM 12675715 crankshaft balancer is a high-quality, reliable replacement part that ensures proper engine balance and longevity. Its OEM status guarantees compatibility, durability, and performance, making it an excellent choice for those prioritizing authenticity and long-term reliability. However, the higher cost and limited availability may deter some buyers, especially those working within a tight budget or seeking convenience.

For most owners of older GM V8 engines, particularly those who value original equipment quality, this balancer is a worthwhile investment. If cost is a major concern, a reputable aftermarket balancer from brands like Fel-Pro, Moroso, or Melling could offer a comparable solution without sacrificing performance.

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- You prioritize OEM quality and exact fitment.

- You are rebuilding or restoring an older GM engine and want to maintain original specifications.

- You have access to an authorized dealer or are willing to pay a premium for guaranteed authenticity.

- You plan to keep the vehicle long-term and want to avoid potential issues with aftermarket parts.

- You are on a tight budget and can find a high-quality aftermarket balancer (e.g., from Fel-Pro or Moroso) that meets or exceeds OEM standards.

- The engine has been heavily modified, and aftermarket parts are more readily available.

- You prefer to support smaller manufacturers or reduce environmental impact by choosing remanufactured or aftermarket options.

**Final Verdict:** For most serious engine builders and enthusiasts, the GM 12675715 crankshaft balancer is the best choice due to its reliability and compatibility. However, those who are cost-conscious or working with modified engines may find a well-reviewed aftermarket part to be a practical substitute. Always verify the seller s reputation and part authenticity to avoid counterfeit or low-quality replacements.

Details:

Product Dimensions: 14 x 8 inches. Manufactured to GM OE specification for fit, form, and function. GM-recommended replacement part for your GM vehicles original factory component. Item model number: 12675715.

Model: Crankshaft Balancer. Brand: GM GENUINE PARTS. Manufacturer Part Number: 12675715. Reduces torsional vibration and serves as a pulley for the engine drive belts.

Some GM Genuine Parts may have formerly appeared AcDelco Original Equipment OE. GM Genuine Parts 12675715 Crankshaft Balancer: Manufacturer: AcDelco. Offering the quality, reliability, and durability of GM OE. Exterior: Machined.

part #: 12675715 prices

• $179.99-$321.74

specifications mixedtoolsetse:

• brand: Gm Genuine Parts
• mpn: 12675715
• upc: 808709480365
• gtin: 00808709480365

shipping mixedtoolsetse:

• type: Fixed
• service: Standard
• transit: 4-10 Days
• cost: $0.00
• class: Standard

returns mixedtoolsetse:

• policy: No Returns

general mixedtoolsetse:

• Tools Workshop Equipment > Hand Tools > Hand Tool Sets
• condition: New

seller mixedtoolsetse:

• rating: 100.0%
• city: US
• # reviews: 838

payments mixedtoolsetse:

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• credit card: Diners-club

offer mixedtoolsetse:

• quantity: 1
• options: Ship-to-home
• availability: In Stock
• sold: 0
• started: May 31, 2026

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