The Seidel Diesel Group is pleased to announce that we are remanufacturing Bosch CP4 Pumps for the GM Duramax. Our new part number for the CP-4 pump is M21CP4-817X.
| APPLICATION | BOSCH CROSS REF | GM CROSS REF |
| This pump fits 2011-2016 Duramax LGH and LML engines. If the eighth digit of the VIN is an 8, the engine is an LML. If the eighth digit is an L, the engine is an LGH.
Bosch Piezo Injector # 0986435409 fits the LGH engine while injector # 0986435410 fits the LML. |
0445010616 | 12639151 |
| 0445010687 | 12638262 | |
| 0445010802 | 12645102 | |
| 0445010817 | 12645103 | |
| 0986437421 | 12658095 | |
| 12661059 |