GM 12579949 Engine Exhaust Valve

( Brand: Gm ), ( Manufacturer Part Number: 12579949 ), ( Part Type: Valve Engine Exhaust ), ( Vintage Part: No )

Review GM New Buick Engine Exhaust Valve Oem fits LACROSSE 2005–2009

The Buick LaCrosse engine exhaust valve, specifically model GM 12579949, is a crucial component of the vehicle's exhaust system. This valve is designed to regulate the flow of exhaust gases from the engine to the rear of the vehicle, improving performance and reducing emissions.

The valve is a 2-piece unit, with the first piece being the valve body itself, and the second piece being the actuator. The valve body is made of high-strength materials, such as cast iron or steel, to ensure durability and resistance to high temperatures and corrosive exhaust gases. The actuator, on the other hand, is typically made of lightweight yet strong materials, such as aluminum, to reduce weight and improve fuel efficiency.

The GM 12579949 exhaust valve is designed for use in various Buick LaCrosse models from 2005 to 2009. It is compatible with both gasoline and diesel engines, making it a versatile solution for a wide range of vehicles. The valve operates electronically, with the actuator controlled by the engine control module (ECM) through a series of electrical signals.

One of the key features of this exhaust valve is its ability to adjust exhaust gas flow based on engine load and driving conditions. This helps to optimize engine performance and improve fuel efficiency. The valve also plays a crucial role in reducing exhaust emissions, helping the vehicle meet federal and local emissions standards.

When the exhaust valve begins to fail, drivers may notice symptoms such as a loss of power, rough idling, or a check engine light. In some cases, the valve may need to be replaced to restore optimal engine performance and prevent further damage to the exhaust system or other components.

Installing a new GM 12579949 exhaust valve is typically a straightforward process, but it is recommended that the job be done by a qualified automotive technician to ensure proper installation and function. The technician will begin by diagnosing the issue with the existing exhaust valve, followed by removing the old valve and installing the new one. The process may also involve calibrating the ECM to ensure proper interaction between the new valve and other engine components.

In summary, the GM 12579949 exhaust valve is a critical component of the Buick LaCrosse exhaust system, responsible for regulating exhaust gas flow and optimizing engine performance. Its durability and resistance to high temperatures and corrosive exhaust gases make it a reliable solution for drivers, while its ability to adjust exhaust gas flow based on driving conditions helps to improve fuel efficiency and reduce exhaust emissions. When the exhaust valve fails, it is essential to have it replaced by a qualified technician to restore optimal engine performance and prevent further damage to the exhaust system or other components.

Buying a GM 12579949 engine exhaust valve for a Buick Lacrosse produced between 2005 and 2009 involves considering several factors. Here are the pros and cons to help you make an informed decision:

1. OEM Part: This is a genuine GM part, ensuring a perfect fit and optimal performance.

2. High Quality: GM parts are known for their durability and reliability, which reduces the need for frequent replacements.

3. Warranty: Generally, GM parts come with a warranty, providing peace of mind and protection against potential defects.

4. Availability: Replacing this part with an OEM option ensures that it is readily available from dealerships and authorized GM parts suppliers.

1. Cost: OEM parts, such as the GM 12579949 engine exhaust valve, are often more expensive than aftermarket alternatives.

2. Limited Customization: Since it is a genuine GM part, you cannot modify it to suit your specific needs or preferences.

3. Delivery Time: Obtaining this part from a dealership or authorized supplier may take longer than purchasing an aftermarket alternative from an online retailer.

Determining whether to buy the GM 12579949 engine exhaust valve depends on your priorities. If you value the peace of mind that comes with a genuine GM part, the assurance of a fitting and reliable replacement, and the warranty protection, then the higher cost may be worth it. However, if you're looking for a more cost-effective solution or want to customize the part, an aftermarket alternative might be a better choice. Ultimately, consider the importance of fit, durability, warranty, and cost when deciding on the engine exhaust valve for your Buick Lacrosse.

If you prioritize the peace of mind, reliability, and warranty protection that comes with a genuine GM part, I would recommend purchasing the GM 12579949 engine exhaust valve from a trusted dealership or authorized GM parts supplier. If cost is a significant concern, consider exploring aftermarket alternatives from reputable brands to find a more affordable option that still meets your performance expectations.

Details:

Please match part numbers and confirm. NEW, OEM with open packaging. Engine Exhaust Valve for 2005 - 2009 Buick LaCrosse.

part #: 12579949 prices

• $25.00-$31.95

specifications voomvalve:

• for models: Lacrosse
• for makes: Buick
• for years: 2005-2009
• brand: Gm
• mpn: 12579949
• part type: Valve Engine Exhaust
• vintage part: No

shipping voomvalve:

• transit: 2-7 Days
• type: Fixed
• class: Standard, Economy
• cost: $0.00
• carrier: FedEx, USPS, UPS
• service: FedEx Ground / FedEx Home Delivery, USPS Ground Advantage, UPS Ground Saver

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• credit card: Discover

seller voomvalve:

• rating: 100.0%
• city: Houston, Texas
• # reviews: 591

general voomvalve:

• condition: New other see details
• Engines Engine Parts > Valvetrain Components > Valves

offer voomvalve:

• best offers: True
• quantity: 1
• sold: 0
• availability: In Stock
• options: Ship-to-home
• started: May 21, 2026

returns voomvalve:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

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