ONER AUTO PARTS Driver Side Valve Cover Kit for 1999–2008 GM V8 (Aluminum, Includes Gasket & Bolts)

ONER AUTO PARTS driver side valve cover replaces GM part numbers 12570427 and 264-965 and ships complete with a gasket, bolts, and sealant for a direct-fit service replacement on many 1999–2008 Chevy, GMC and Cadillac V8 engines.

Whether you are repairing an oil leak, refreshing a high-mileage engine, or performing routine maintenance, this driver-side valve cover kit is built to restore a proper seal and simplify installation. Manufactured from cast aluminum with a molded rubber sealing lip and supplied with the hardware you need, the assembly is engineered to fit a wide range of 4.8L, 5.3L, 5.7L, 6.0L and 6.2L V8 GM engines covered in the compatibility list.

Will this valve cover fit my vehicle?

Compatibility centers on GM V8 engines and the years listed. Confirm your vehicle's model year and engine size against the fitment list before ordering to ensure a correct match. It replaces OE numbers 12570427 and 264-965 used on many Chevrolet, GMC, and Cadillac platforms.

• Fits many 1999–2008 Chevy Silverado, Suburban, Tahoe, Avalanche, Express, Corvette models.
• Fits many 1999–2008 GMC Sierra, Yukon, Savana, Envoy platforms.
• Compatible with Cadillac Escalade and CTS models where the OE numbers match.
• Supports 4.8L, 5.3L, 5.7L, 6.0L and 6.2L V8 engine applications (verify engine code).

How is the valve cover kit constructed and what’s included?

The assembly uses a robust aluminum cover matched to a precision-molded rubber gasket for consistent sealing performance. The kit arrives ready to install with bolts and a tube of sealant to address mating surfaces and ensure an oil-tight connection.

• Cast aluminum valve cover for corrosion resistance and dimensional stability.
• Pre-formed rubber gasket designed to maintain a reliable seal under heat.
• Installation hardware (bolts) and sealant included to complete the repair correctly.
• Tested at the factory to meet fit and finish expectations before shipping.

What are the practical benefits of replacing a worn valve cover?

Replacing a degraded valve cover and gasket stops oil leaks that can foul spark plug wells, drip onto hot exhaust components, or create smoke and odor in the engine bay. A tight seal helps preserve engine cleanliness and avoids secondary damage that increases repair costs.

• Eliminates oil seepage from the head cover and spark plug wells.
• Prevents burning oil smells and potential contamination of ignition components.
• Maintains engine bay cleanliness and reduces maintenance time on follow-up repairs.
• Affordable alternative to dealer pricing for equivalent OEM replacement numbers.

Who is this for? This ONER AUTO PARTS valve cover kit is intended for DIY mechanics, independent repair shops, and fleet maintainers working on GM trucks, SUVs, and performance cars from the late 1990s through the 2000s who need a direct-fit replacement that includes all necessary sealing pieces. If your vehicle matches the provided fitment or lists OE 12570427 / 264-965, this kit provides a cost-effective, ready-to-install solution to stop leaks and restore a secure valve cover seal. Always verify engine displacement and part number compatibility before purchase.