Product Description
Genuine GM 12688186 L8T Head Gasket | 6.6L Gasoline Engines | Fits 2020+ Chevrolet & GMC HD Trucks & Vans
The Genuine GM 12688186 L8T head gasket is the OEM replacement designed specifically for 2020-newer 6.6L L8T V8 gasoline engines. Featuring a 5-layer multi-layer steel (MLS) construction, this gasket provides the strength and reliability required for heavy-duty truck and van applications. Whether you are replacing a worn gasket or performing a full rebuild, GM’s factory-engineered design ensures a perfect fit, superior sealing, and long-lasting durability under high-load conditions.
Key Features:
- OEM Quality: Genuine GM part designed as a direct replacement for factory-installed gaskets.
- Durable MLS Construction: Built with 5-layer multi-layer steel for maximum strength and reliability.
- Precision Fitment: Engineered for 2020+ 6.6L L8T gasoline engines with VIN code "7".
- Heavy-Duty Performance: Designed to withstand the demands of towing, hauling, and commercial use.
- Versatile Options: Available as a single gasket or a pair (2) to suit your repair or rebuild needs.
Specifications:
- Bore Opening: 4.100"
- Compressed Thickness: .054"
- Material: 5-Layer Multi-Layer Steel (MLS)
Applications:
Fits 2020-newer GM 6.6L Gasoline L8T engines (8th digit of VIN = 7). Applications include:
- Chevrolet Express 2500 (2021–2025)
- Chevrolet Express 3500 (2021–2025)
- Chevrolet Express 4500 (2021–2025)
- Chevrolet LCF (2020–2025)
- Chevrolet Silverado 2500 (2020–2025)
- Chevrolet Silverado 3500 (2020–2025)
- GMC Savana 2500 (2021–2025)
- GMC Savana 3500 (2021–2025)
- GMC Savana 4500 (2021–2025)
- GMC Sierra 2500 (2020–2025)
- GMC Sierra 3500 (2020–2025)
