The Alliant Power AP0135 is a new High-Pressure fuel pump installation kit for 2017–2020 GM L5P Duramax applications. Alliant’s Fuel Injection Pump Installation Kit supports fuel injection pump service by providing components used during pump installation.

Features & Benefits

• New Alliant Power High-Pressure Fuel Pump Installation Kit (Alliant P/N AP0135)
• Fit, form, and function tested to meet or exceed original-equipment standards (per Alliant Power)
• Direct replacement for 12665248 / 12705429 / 12662038
• Backed by Alliant Power’s 24-month, unlimited-mileage warranty

Application

• Chevrolet Silverado 2500 HD / Silverado 3500 HD (2017–2020)
• GMC Sierra 2500 HD / Sierra 3500 HD (2017–2020)
• Chevrolet Silverado 4500 HD / Silverado 5500 HD / Silverado 6500 HD (2019–2020)
• 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: 12665248, 12705429, 12662038, 12658352, 12648141, 12648140
• Navistar: 6040685C91, 6040546C1, 6040540C1, 6040537C1, 6040513C1, 6040512C1, 6040491C1, 6040488C1, 6040481C1, 6040466C1
• Alliant Power: AP0135

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