Product Description
Fix surging, loping idle, and rail pressure errors on your LB7 with the INDUSTRIAL INJECTION 0928400535-IIS Fuel Control Actuator (FCA), also known as the CP3 metering unit/MPROP. This OE-equivalent regulator restores accurate fuel metering and stable rail pressure on 2001–2004 6.6L Duramax LB7 trucks.
Fitment
- 2001–2004 Chevrolet Silverado/GMC Sierra 2500HD/3500 — 6.6L Duramax LB7
What’s Included
- (1) Fuel Control Actuator (FCA) / CP3 metering unit
- OE-style O-ring/seal (as supplied by manufacturer)
Why Buy This FCA
- OE-equivalent control for smooth idle and commanded rail pressure
- Direct bolt-on to the factory Bosch CP3 pump on LB7
- Durable construction to withstand heat, vibration, and fuel contaminants
Recommended Parts (CPP Internal Links)
- Shop GM Duramax CP3 Fuel Pumps & Components
- AirDog® Lift Pump Systems (LB7/LLY/LBZ) — stabilize supply pressure and protect the CP3
- Duramax Fuel Filters & Filtration Upgrades — keep debris/water out of the FCA and CP3
- BOSTECH Reman CP3 Pump — 2001–2004 LB7
- LB7 Injectors & Nozzles — address worn injectors if rail control issues persist
Cross-Reference / Alternatives
- Common OE numbers: Bosch 0928400535 (0 928 400 535); GM 97728979 (for reference)
- Performance/alternative CP3 options: S&S NEW LBZ-based CP3 (LB7/LLY/LBZ/LMM)
Install Notes
- Relieve rail pressure and disconnect batteries before service.
- Inspect/replace the CP3 inlet seal and any disturbed gaskets.
- After installation, clear DTCs and verify commanded vs. actual rail pressure.
FAQ
What symptoms point to a failing FCA?Common signs include surging or “lope” at idle, hard starts, rail pressure codes, and unstable desired vs. actual rail pressure on a scan tool.
Is tuning required after replacing the FCA?No. This is an OE-equivalent metering unit; no calibration changes are needed for a stock fuel system.
Will this fit LLY/LBZ/LMM?This listing is for the 2001–2004 LB7 CP3. Later generations use different components; see the Duramax CP3 category for other years.
What else should I replace with the FCA?Ensure your fuel filter is fresh and consider a lift pump to stabilize supply pressure. If problems remain, inspect the CP3 and injectors.
