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1997-2004 Corvette C5 LS1 Engine Water Pump to Block Gasket – 12559648

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Brand Logo GM Genuine Parts
Item ID: 617-389
GM Part #: 12559648
Availability: In Stock - Ships today if ordered by 3 PM CT
Fits Years:
  • 1997-2004
$5.99
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  • Description

1997-2004 C5 LS1 Engine Water Pump to Block Gasket – 12559648 - OEM Number(s) (12559648)

OE Gasket for LS1 Water Pump-to-Block Seal

Fix unwanted coolant leaks at the water pump flange with this GM-correct water pump gasket for 1997–2004 LS1-powered Corvettes. Designed for a precise seal between the pump and engine block, this die-cut composite gasket matches GM #12559648 and features proper port alignment and thickness for reliable, leak-free installation.

Whether you're replacing a pump or resealing a coolant seep, trust this OEM-style gasket to deliver the long-term reliability your LS1 deserves.

Features
• Fits 1997–2004 C5 Corvettes with LS1 engines
• Replaces GM part number 12559648
• Correct shape, port dimensions, and bolt spacing
• Die-cut for OE port alignment and sealing surface
• Sold individually—2 required per Corvette

Dimensions and Weight
• Bolt Centerline Width: 2-5/16"
• Total Height: 3-13/16"
• Water Port Opening: 1-3/4"
• Bypass Port Opening: 1-1/4"
• Gasket Thickness: 1/32"
• GM OE Number: 12559648
• Shipping Weight: 0.2 oz

Because Details Matter
Gaskets aren’t just fillers—they’re your engine’s frontline defense against coolant leaks. Mid America Motorworks delivers OE-level quality for a reliable seal where it counts.

Also known under these part numbers: (For reference only)

  • 12559648
  • 686420322153
Prop 65