Hawks Motorsports offers our clients this 12634614 GM Genuine Parts Front Crankshaft Engine Oil Seal designed to provide a reliable OEM-quality solution for sealing the front crankshaft opening and helping prevent engine oil leaks. Manufactured by General Motors, this genuine replacement seal is engineered, tested, and validated to meet GM’s strict fitment and durability standards.

The front crankshaft oil seal plays a critical role in maintaining proper crankcase sealing by preventing oil from escaping around the crankshaft snout and front cover area. GM Genuine Parts seals are designed to withstand engine heat, pressure, and operating conditions while providing long-lasting performance comparable to the original factory-installed component.

This direct replacement GM seal is ideal for engine repairs, preventative maintenance, and restoration projects where maintaining factory specifications and reliability is important. Replace worn or leaking front crankshaft seals with a genuine GM component designed specifically for GM applications.

Key Features:

• Part Number: 12634614
• Manufacturer: GM Genuine Parts
• OEM Replacement Front Crankshaft Engine Oil Seal
• Also known as:
  • Front Main Seal
  • Crankshaft Front Oil Seal
  • Engine Front Cover & Crankshaft Seal
• Designed and validated by General Motors
• Helps prevent front crankshaft oil leaks
• Maintains proper crankcase sealing
• Spring-loaded multi-lip seal design
• Direct replacement fitment
• OEM-quality construction
• Replaces GM part number 12693255

Product Specifications:

• Seal Position: Front Crankshaft
• Seal Type: Spring Loaded Multi Lip
• Material: Steel / Plastic Construction
• Color: Black
• Inside Diameter: 2.13"
• Outside Diameter: 2.83"
• Thickness: 0.31" (8 mm)
• Classification: OE

Fitment Applications:

Fits select GM vehicles including:

Chevrolet Applications:

• Chevrolet Camaro
• Chevrolet Corvette
• Chevrolet Silverado
• Chevrolet Tahoe
• Chevrolet Suburban

GMC Applications:

• GMC Sierra
• GMC Yukon

Cadillac Applications:

• Cadillac CTS-V
• Cadillac CT5-V Blackwing
• Cadillac Escalade

Compatible with select GM engines including:

• 5.3L V8
• 6.2L V8
• LT-based performance applications

Always verify exact vehicle fitment before installation.

Installation Notes:

• Designed as a direct replacement front crankshaft seal.
• Requires removal of the crankshaft harmonic balancer and front cover components for installation.
• Inspect crankshaft sealing surface before installation.
• Proper seal installation depth and alignment are critical to prevent future leaks.
• Lubricate seal lip before installation.
• Replace damaged harmonic balancer sealing surfaces if necessary.
• Professional installation is recommended.