The Alliant Power AP54821 is a remanufactured fuel contamination kit for 2019–2023 GM L5D Duramax applications. Alliant’s Fuel Contamination Kit supports fuel-system service when contamination has affected fuel delivery components.

Features & Benefits

• Remanufactured Alliant Power Fuel Contamination Kit (Alliant P/N AP54821)
• 100% all Genuine OE or OE equivalent validated components
• One convenient kit that includes all necessary components to do a fuel system repair
• USA assembled and built proudly in an ISO 9001:2015 Certified Facility
• Direct replacement for 12676904 / 12678993 / 12696967
• Backed by Alliant Power’s 36-month, unlimited-mileage warranty

Application

• Chevrolet Silverado 4500 HD / Silverado 5500 HD / Silverado 6500 HD (2019–2024)
• Chevrolet Silverado 4500 HD / Silverado 5500 HD / Silverado 6500 HD (2019–2022)
• 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: 12676904, 12678993, 12696967, 12698553, 12701094, 12718814, 19405644, TP2011
• Navistar: 2515892C91, 4086959C1, 6040608C9, 6040608C91, 6040630C9, 6040630C91, 6040630C92, 6040630C93, 6040630C94, 6040630C95
• Alliant Power: AP54821

Warranty: Alliant Power lists this complete fuel contamination kit on its 3-year warranty coverage list (36 months, unlimited mileage/hours; parts & labor per Alliant’s policy).

A refundable core charge is added at checkout and refunded when your old components are returned per our core terms.