11-16 GM 6.6L LML Duramax Fuel System Contamination Kit 

Restore Your Duramax with Complete Confidence

If your 2011–2016 Chevrolet Silverado or GMC Sierra 6.6L Duramax is experiencing hard starts, no starts, or a sudden loss of power, and you’re seeing trouble codes like P0097, P0088, P0191, or P128E, there’s a strong chance of CP4 pump failure caused by water, DEF, or fuel contamination. Once the injection pump fails, contaminants can quickly travel throughout the high-precision fuel system—making complete replacement critical to prevent future damage.

The Alliant Power Fuel Contamination Kit includes every essential OE-quality component in one convenient package to ensure a full, reliable repair. Each part is tested at 15 separate points for leak-free operation and peak performance.

Kit Contents:

• (1) Bosch Remanufactured CP4 Fuel Pump (OE# 12661059)

• (1) Driver Side Bosch Fuel Rail with Regulator and Sensor (OE# 12651989)

• (1) Passenger Side Bosch Fuel Rail (OE# 12620532)

• (8) Remanufactured Bosch Fuel Injectors (OE# 19256590)

• (1) Regulated Return Fuel Line (OE# 12639000)

• (8) Rail to Injector Lines (OE#s 12670468, 12670469, 12670471, 12670460)

• (1) Rail to Rail Line (OE# 12670466)

• (1) Driver Side Pump to Rail Line (OE# 12670474)

• (1) Passenger Side Pump to Rail Line (OE# 12670475)

Key Features and Benefits:

• 100% genuine OE or OE-equivalent validated components

• Each component tested at 15 points for quality and durability

• Assembled in the USA at an ISO 9001:2015 certified facility

• 24-month, unlimited mileage warranty

• Fast shipping and expert support from NorCal Diesel Performance

Vehicle Fitment:

• 2011–2016 Chevrolet Silverado 2500 & 3500 HD (6.6L Duramax LML)

• 2011–2016 GMC Sierra 2500 & 3500 HD (6.6L Duramax LML)

About Alliant Power:

Alliant Power is a respected industry leader providing OE-quality fuel system components for diesel vehicles across agriculture, construction, commercial transport, and industrial sectors. Known for exceptional quality, technical support, and reliability, Alliant Power products are trusted by professionals worldwide.

Note: Core charges may apply. Please ensure all cores are returned in rebuildable condition to qualify for full credit.

Get your Duramax back to peak performance with the Alliant Power Fuel Contamination Kit—available now from NorCal Diesel Performance.