2001-2004 Duramax Bosch OEM Reman Injection Pump (0986437303-IIS)
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Description
Description
Industrial Injection Bosch OEM remanufactured CP3 injection pump for 2001-2004 Chevrolet Silverado 2500HD/3500 and GMC Sierra 2500HD/3500 6.6L LB7 Duramax. Each pump arrives at IIS direct from the OE Bosch supplier, then is engineered at the IIS facility using OE Spec Plus parts and IIS's extended calibration process.
This listing has four variants by trim — stock (-IIS), -SHO, -DF, and -DD. Pick the trim that matches your build's fuel demand. Higher-output trims require matching injector and tuning upgrades to use the extra fuel volume.
Features
Features
- Bosch OEM Reman CP3 Injection Pump
- Built on OE Bosch Core, OE Spec Plus Parts
- Extended IIS Calibration Process
- Smooth Clean Idle
- Improved Mileage vs. Worn CP3
- Maintains Rail Pressure
- Direct OE Replacement (Stock Trim)
- 1-Year Unlimited Mileage Warranty
- Part Numbers: 0986437303-IIS (stock) / -SHO / -DF / -DD
Notes
Notes
- Higher-CC trims (SHO / DF / DD) require matched injectors and tuning to use the additional fuel volume.
- For the new (not reman) performance CP3, see the 0445020017SHO New Performance CP3.
- Core deposit applies — keep your old CP3 pump and return it to recover the deposit.
Questions and Answers
Questions and Answers
Previously asked questions
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Does this pump come with the regulator/fuel control actuator as shown in the picture? And does it fit an LB7 as the initial description says?
Yes to both questions!

