The Alliant Power AP0136 is a new cylinder 3 Injector/EGR gasket kit for 2017–2025 GM L5P Duramax applications.

Features & Benefits

• New Alliant Power Cylinder 3 Injector/EGR Gasket Kit (Alliant P/N AP0136)
• Direct replacement for 12670476 / 12670937 / 12677469
• Backed by Alliant Power’s 24-month, unlimited-mileage warranty

Application

• Chevrolet Silverado 2500 HD / Silverado 3500 HD (2017–2025)
• GMC Sierra 2500 HD / Sierra 3500 HD (2017–2025)
• Chevrolet Silverado 4500 HD / Silverado 5500 HD / Silverado 6500 HD (2019–2025)
• 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: 12670476, 12670937, 12677469, 12677819, 12680216, 12688014
• Alliant Power: AP0136

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