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Restore your LML Duramax after CP4 failure with the complete Alliant Power AP57004 Fuel Contamination Kit.
When the CP4 high-pressure fuel pump fails on your 2011–2016 6.6L Duramax LML — often due to water contamination, DEF intrusion, or running low on fuel — metal debris and contaminants are forced throughout the entire high-pressure fuel system. Simply replacing the pump or flushing the lines is not enough. Leftover contaminants will quickly destroy your new components and lead to repeat failures.
The Alliant Power AP57004 Fuel Contamination Kit delivers a true one-box solution. It includes every critical OE-quality or OE-validated component needed for a complete, reliable repair so you can get your truck back on the road with confidence.
Key Benefits & Features
- Complete kit — replaces the entire contaminated high-pressure fuel system in one package
- OE or OE-equivalent validated Bosch remanufactured components (no cheap aftermarket parts)
- Every component is 100% end-of-line tested at 15 separate points for leak-free performance
- Proudly assembled in the USA in an ISO 9001:2015 certified facility
- Prevents repeat failures by eliminating hidden contaminants left behind from a failed CP4 pump
- Direct fit for 2011–2016 GM 6.6L LML Duramax engines
Kit Contents
- (1) Bosch Reman CP4 Fuel Pump – OE# 12661059
- (1) Driver Side Bosch Fuel Rail w/ Pressure Regulator & Sensor – OE# 12651989
- (1) Passenger Side Bosch Fuel Rail – OE# 12620532
- (8) Reman Bosch Fuel Injectors – OE# 19256590
- (1) Regulated Return Fuel Line – OE# 12639000
- (8) Rail-to-Injector Lines (OE# 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
Symptoms This Kit Addresses
- Hard start or no-start conditions
- Sudden loss of power
- Diagnostic trouble codes: P0097, P0088, P0191, P128E
Vehicle Fitment
- 2011–2016 Chevrolet Silverado 2500HD & 3500HD (6.6L Duramax LML)
- 2011–2016 GMC Sierra 2500HD & 3500HD (6.6L Duramax LML)
- Also fits 2011–2016 Chevrolet Express & GMC Savana vans with LML engine
Restore your LML Duramax after CP4 failure with the complete Alliant Power AP57004 Fuel Contamination Kit.
When the CP4 high-pressure fuel pump fails on your 2011–2016 6.6L Duramax LML — often due to water contamination, DEF intrusion, or running low on fuel — metal debris and contaminants are forced throughout the entire high-pressure fuel system. Simply replacing the pump or flushing the lines is not enough. Leftover contaminants will quickly destroy your new components and lead to repeat failures.
The Alliant Power AP57004 Fuel Contamination Kit delivers a true one-box solution. It includes every critical OE-quality or OE-validated component needed for a complete, reliable repair so you can get your truck back on the road with confidence.
Key Benefits & Features
Complete kit — replaces the entire contaminated high-pressure fuel system in one package
OE or OE-equivalent validated Bosch remanufactured components (no cheap aftermarket parts)
Every component is 100% end-of-line tested at 15 separate points for leak-free performance
Proudly assembled in the USA in an ISO 9001:2015 certified facility
Prev[...]
Restore your LML Duramax after CP4 failure with the complete Alliant Power AP57004 Fuel Contamination Kit.
When the CP4 high-pressure fuel pump fails on your 2011–2016 6.6L Duramax LML — often due to water contamination, DEF intrusion, or running low on fuel — metal debris and contaminants are forced throughout the entire high-pressure fuel system. Simply replacing the pump or flushing the lines is not enough. Leftover contaminants will quickly destroy your new components and lead to repeat failures.
The Alliant Power AP57004 Fuel Contamination Kit delivers a true one-box solution. It includes every critical OE-quality or OE-validated component needed for a complete, reliable repair so you can get your truck back on the road with confidence.
Key Benefits & Features
- Complete kit — replaces the entire contaminated high-pressure fuel system in one package
- OE or OE-equivalent validated Bosch remanufactured components (no cheap aftermarket parts)
- Every component is 100% end-of-line tested at 15 separate points for leak-free performance
- Proudly assembled in the USA in an ISO 9001:2015 certified facility
- Prevents repeat failures by eliminating hidden contaminants left behind from a failed CP4 pump
- Direct fit for 2011–2016 GM 6.6L LML Duramax engines
Kit Contents
- (1) Bosch Reman CP4 Fuel Pump – OE# 12661059
- (1) Driver Side Bosch Fuel Rail w/ Pressure Regulator & Sensor – OE# 12651989
- (1) Passenger Side Bosch Fuel Rail – OE# 12620532
- (8) Reman Bosch Fuel Injectors – OE# 19256590
- (1) Regulated Return Fuel Line – OE# 12639000
- (8) Rail-to-Injector Lines (OE# 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
Symptoms This Kit Addresses
- Hard start or no-start conditions
- Sudden loss of power
- Diagnostic trouble codes: P0097, P0088, P0191, P128E
Vehicle Fitment
- 2011–2016 Chevrolet Silverado 2500HD & 3500HD (6.6L Duramax LML)
- 2011–2016 GMC Sierra 2500HD & 3500HD (6.6L Duramax LML)
- Also fits 2011–2016 Chevrolet Express & GMC Savana vans with LML engine