Description
Product Overview
The General Motors transmission sealing ring is a precision‑engineered component designed for a broad spectrum of GM passenger vehicles. Finished in a sleek black color, the round seal measures 17 x 9 x 4 inches and weighs 2 pounds, offering a robust yet lightweight solution. Manufactured to OEM specifications (Part No. 12590366), it guarantees a perfect fit for models such as Impala, Monte Carlo, Bonneville, LeSabre, Park Avenue, Grand Prix, LaCrosse, Lucerne, and Riviera, including 3.8L engines without superchargers. Its vehicle‑specific design eliminates the guesswork of generic parts, ensuring optimal sealing performance and longevity.
Usage
This sealing ring is intended for use during transmission maintenance, repair, or replacement on GM passenger cars. Ideal for both professional mechanics and DIY enthusiasts, it fits seamlessly into standard service procedures, providing a reliable barrier against fluid leaks. Whether you are performing a routine transmission fluid change or addressing a leak issue, this part delivers consistent protection in everyday driving conditions and under demanding performance scenarios. 
Why Choose Us
Choosing this General Motors sealing ring means opting for OEM quality, exact fit, and durability. Produced by the original manufacturer, it meets strict automotive standards and undergoes rigorous testing to ensure leak‑free operation. Our commitment to quality control means you receive a part that matches the original equipment in material composition and dimensional accuracy, reducing the risk of premature wear. Additionally, the product is backed by a reliable warranty and supported by knowledgeable customer service.
Key Features
- Exact vehicle‑specific fit for a wide range of GM models
- Durable black rubber material resists heat and chemical exposure
- OEM part number 12590366 ensures compatibility with original specifications
- Easy installation reduces service time and labor costs
- Designed to prevent transmission fluid leaks and protect drivetrain components
FAQ
Is this sealing ring compatible with all GM models?
It fits a broad selection of GM passenger cars, including Impala, Monte Carlo, Bonneville, LeSabre, Park Avenue, Grand Prix, LaCrosse, Lucerne, and Riviera, especially those with 3.8L engines without a supercharger.
Do I need special tools to install this sealing ring?
No special tools are required; standard transmission service tools are sufficient for installation.
Can I use this part as a direct replacement for the original seal?
Yes, it is an exact OEM match (Part No. 12590366) and is intended as a direct replacement for the factory‑installed seal.
What warranty does this product carry?
The sealing ring comes with a limited warranty covering manufacturing defects for a specified period from the date of purchase.
Will this seal handle high‑performance driving conditions?
The material is formulated to withstand typical operating temperatures and pressures, making it suitable for both daily driving and moderate performance use.
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