JkorkM Oil Pan Gasket Kit for GM Vortec 4.8–6.2L — OEM Fit with Installation Accessories

JkorkM's 12612350 (OS30693R) oil pan gasket kit is a premium replacement gasket set engineered to reseal the oil pan on GM 4.8L–6.2L Vortec engines and stop oil leaks reliably.

If your Chevrolet, GMC, Cadillac or Buick with a Vortec engine is showing oil drips or low oil levels, a failing oil pan gasket is a common culprit. This kit from JkorkM replaces multiple OEM numbers (including 12612350 and OS30693R) and ships with installation accessories to help you complete the job correctly. The gasket is molded from durable material designed to resist oil, heat, and road contaminants while restoring a factory-style seal.

Which vehicles and engines is this gasket compatible with?

This JkorkM gasket kit fits a wide range of GM vehicles equipped with Vortec engines. It supports 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L engines across many model years and nameplates.

• Common fits: Chevrolet Silverado, Tahoe, Suburban, Avalanche, Camaro, Colorado, Express.
• Also fits GMC Sierra, Yukon, Canyon, Savana and SUVs like Envoy and Sierra models.
• Coverage spans model years roughly from 1999 through 2020 for the listed engines.

What parts are included and what will I receive?

The kit provides the gasket plus small installation aids so you can perform the replacement with fewer trips to the store. Everything is packaged to simplify a tidy install and protect the new seal until fitment.

• 1 oil pan gasket molded to match OEM sealing surfaces precisely.
• 1 pair of disposable gloves and 1 dust brush for cleaner installation.
• Backed by a 12-month warranty and responsive customer support.

How does the JkorkM gasket handle durability and sealing performance?

The gasket is manufactured using materials selected for chemical and thermal resistance so it maintains a firm seal under typical engine conditions. It’s engineered to meet or exceed OEM fit and function expectations without introducing outgassing or early deformation.

• High-grade gasket material resists oil, heat, and road contaminants.
• Precision molding minimizes gaps and improves torque retention at bolt flanges.
• Tested for long-term wear resistance and dimensional stability.

When should I replace my oil pan gasket and what problems does it prevent?

Replace the oil pan gasket when you see visible oil leaks, oil pooling under the vehicle, or when engine oil levels drop for no other clear reason. Early replacement prevents contamination and helps avoid ancillary damage from oil dripping onto exhaust or suspension components.

• Signs: visible oil stains, burning oil smell, or low-but-unchanged oil pressure.
• Prevents contaminants entering the oil system and potential engine component damage.
• Maintains proper oil level and reduces risk of secondary repairs caused by leaks.

Who is this for? JkorkM’s 12612350 / OS30693R oil pan gasket kit is aimed at do-it-yourself mechanics and professional technicians working on GM Vortec engines who want an OEM-replacement-quality seal. It suits owners of Chevrolet, GMC, Cadillac and Buick vehicles experiencing oil pan leaks or performing routine engine maintenance. If you require a direct replacement for OEM part numbers listed, want a kit that includes simple installation tools, and expect long-lasting performance under typical driving conditions, this gasket kit is a practical choice.