2011-2016 Duramax CP4 Fuel Injection Pump (12661059)
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Description
Description
Fits
| Year | Make | Model | Engine |
| 2011-2016 | Chevrolet/GMC | Silverado/Sierra 2500HD/3500HD | 6.6L LML Duramax |
The CP4 pump pressurizes and propels diesel fuel into your Duramax engine's internal combustion chamber through the fuel injectors.
While the previous models (2001-2010) relied on the stable yet inefficient CP3 pump, the CP4 is a powerhouse that packs high pressure with less volume for maximum efficiency and cost-effectiveness.
Even though it's more efficient, the CP4 platform has some erosion problems that can send metal debris through your fuel system. Accumulation of this debris will eventually cause a total breakdown and expensive repairs.
Part Number: 12661059
Features
Features
- Maximum Efficiency
- No Core Charge
- High-Quality
Warranty
Warranty
Parts Only
- 1-Year Warranty
Questions and Answers
Questions and Answers
Previously asked questions
We've compiled a list of questions and answers below.
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With respect to the CP4 feul pump, at what mileage should the pump need to be rebuilt or replaced?
CP4 failures are common between 80k-150k miles - but they are not rebuildable; full system replacement is often needed if it fails.
