INDUSTRIAL INJECTION 0928400673-IIS GM FCA (MPROP/FUEL PRESSURE REGULATOR) — 2006–2010 DURAMAX 6.6L LBZ/LMM

Restore smooth idle and consistent rail pressure on your LBZ/LMM with the INDUSTRIAL INJECTION 0928400673-IIS GM FCA (also called MPROP/fuel pressure regulator). This OE-style regulator mounts on the back of the CP3 and is a direct-fit replacement for 2006–2010 Duramax 6.6L LBZ/LMM trucks.

Fitment

• 2006–2007 LBZ 6.6L Duramax
• 2007.5–2010 LMM 6.6L Duramax

What’s Included

• (1) Fuel Control Actuator / Rail Pressure Regulator (FCA/MPROP)
• O-ring/seal (as packaged by manufacturer)

Key Features

• Direct-fit CP3 regulator for LBZ/LMM—no tuning required for stock replacement
• Addresses common lope/surge at idle and erratic rail pressure
• OE-style electrical connector and mounting

Cross-Reference / Alternatives

• Replaces Bosch 0 928 400 673 / 0928400673 and GM 97384667 (numbers shown for identification only).
• Considering a full pump refresh? See CP3 replacements and upgrades below.

Recommended Parts (CPP Internal Links)

• S&S CP3-DMX (NEW LBZ-based) — 2001–2010 LB7/LLY/LBZ/LMM
• S&S 12mm High-Speed CP3 — LB7/LLY/LBZ (01–10)
• S&S 14mm High-Speed CP3 + SP3000 — LB7/LLY/LBZ (01–10)
• Fuel Filtration (filters, housings, bleeders)
• Shop All GM Duramax Categories

Helpful Notes

• Before condemning the FCA, verify lift-pump supply, filter condition, and check for air leaks.
• Clear DTCs and perform a rail-pressure relearn/idle relearn if applicable after installation.

FAQ

On LBZ/LMM trucks, a worn FCA can cause unstable rail pressure and surging. Replacing it typically restores smooth idle when fuel supply and filters are healthy.

No. This is an OE-style replacement that does not require tuning when replacing a stock FCA.

It bolts to the rear of the CP3 high-pressure pump and connects to the factory harness.

If your pump has high miles or you’re increasing power, refreshing or upgrading the CP3 can improve reliability and rail stability. See recommended CP3 options above.