The Alliant Power AP0050 is a new grade A 0.95mm right (passenger-side) head gasket for 2001–2016 GM Duramax applications. Alliant’s Engine Cylinder Head Gasket seals the cylinder head to the engine block to help contain combustion pressure, coolant, and oil passages.

Features & Benefits

• New Alliant Power Grade A 0.95mm right (passenger-side) head gasket (Alliant P/N AP0050)
• Fitment Position: Passenger or Right Side
• Thickness: 0.95mm
• Bore Diameter: 105.4mm
• Design: Multilayer Steel with FKM bead
• 1x Multi Layer Steel (MLS) Head Gasket
• Direct replacement for 12637790 / 19301795 / 97188464
• Backed by Alliant Power’s 24-month, unlimited-mileage warranty

Included in the Box

• 1x Multi Layer Steel (MLS) Head Gasket

Application

• Chevrolet Silverado 2500 HD (2001–2016)
• Chevrolet Silverado 3500 (2001–2006)
• GMC Sierra 2500 HD (2001–2016)
• GMC Sierra 3500 (2001–2006)
• Chevrolet Silverado 3500 Classic / Silverado 2500 HD Classic (2007)
• Chevrolet Silverado 3500 HD (2007–2016)
• GMC Sierra 3500 Classic / Sierra 2500 HD Classic (2007)
• GMC Sierra 3500 HD (2007–2016)
• Alliant Power lists additional vehicle applications for this part number

Always verify fitment against your VIN, engine, and OE part number before ordering.

Cross-Reference / Replaces

• General Motors: 12637790, 19301795, 97188464, 97288223, 97309559, 97333722, 97378099, 98030628, 98045055, 98062780
• Alliant Power: AP0050

Warranty: Alliant Power’s standard warranty: 24 months with unlimited miles/hours on installed parts (Alliant Power warranty policy, rev. Aug 2025).