2011-2016 GM 6.6L DURAMAX LML
Replace the failed factory CP4 injection pump in your 2011-2016 GM 6.6L Duramax LML with a DDP NCP4-421 New CP4 Injection Pump. This brand new CP4 pump comes ready to install and is backed by DDP's 1-year unlimited mileage warranty!
New Stock CP4
No Core Required
1-Year Unlimited Mileage Warranty