Description
Product Overview
The Sumyola transmission main seal is a direct replacement for OEM part numbers 12705663, 12665077, 12617790, 12623310 and 635‑786. Designed for Chevrolet Silverado 1500/2500 HD, Tahoe, Suburban, GMC Sierra 1500, Yukon, Yukon XL and Cadillac Escalade/Esv models, it fits the factory‑specified dimensions and tolerances. Crafted from high‑grade, temperature‑resistant polymer, the seal resists oil degradation and maintains elasticity under extreme conditions. Package dimensions are 12.64 x 12.48 x 2.48 inches, weighing 2.91 lb, and the product carries IATF 16949:2016 certification, reflecting over 16 years of manufacturing expertise.
Usage
This seal is intended for professional mechanics and DIY enthusiasts performing transmission maintenance, rebuilds or replacements. It excels in heavy‑duty applications such as towing, off‑road driving and high‑temperature environments where a dependable seal prevents fluid loss and protects internal components. Suitable for both standard and extended‑warranty service intervals, it ensures smooth power delivery across a variety of driving conditions. 
Why Choose Us
Sumyola combines a state‑of‑the‑art factory with an independent quality‑control department that conducts repeated testing on every seal. Our one‑year warranty and remote engineering support guarantee peace of mind, while our VIN verification service ensures perfect fitment before purchase. The company’s long‑standing reputation in automotive parts, reinforced by IATF certification, means you receive a product that meets rigorous industry standards and delivers consistent performance.
Key Features
- Exact OEM fit for multiple Chevrolet, GMC, Tahoe, Yukon and Cadillac models
- High‑grade polymer construction resists oil degradation and heat
- Certified IATF 16949:2016 manufacturing process
- One‑year warranty with dedicated remote engineering support
- VIN verification service ensures correct part selection
FAQ
Does this seal fit a 2022 Chevrolet Silverado 1500?
Yes, the seal is compatible with Chevrolet Silverado 1500 models up to the 2025 production year. Providing the VIN will confirm exact fitment.
What is the warranty period?
Sumyola offers a one‑year limited warranty covering manufacturing defects and material failures.
Can I install this seal myself?
The seal is designed for straightforward installation with standard tools. Detailed instructions are included, and our support team can assist remotely if needed.
Is the seal tested for high‑temperature performance?
Yes, each seal undergoes rigorous heat‑resistance testing to ensure reliable operation under extreme conditions.
What should I do if the part does not fit my vehicle?
Contact Sumyola with your VIN; we will verify compatibility within one business day and arrange an immediate refund for non‑applicable parts.
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