2004.5–2010 Chevy GMC 6.6L Duramax CCV/PCV Reroute Vent Kit (LLY/LBZ/LMM)

2004.5–2010 GM 6.6L Duramax (LLY/LBZ/LMM) CCV/PCV Reroute Ventilation Kit

Stop feeding oil vapor back into your intake tract. This CCV/PCV reroute kit replaces the restrictive factory crankcase ventilation crossover and redirects blow-by vapors away from the turbo inlet—helping keep your turbo, intercooler piping, and intake system cleaner over time.

Why you’ll want it

• Keeps oil mist out of the intake/turbo inlet to reduce buildup and grime in the charge system.
• Free-flow CCV routing to help crankcase ventilation breathe more freely (especially on higher-mileage trucks).
• Frees up engine-bay clutter by removing the bulky factory routing/resonator connection points.

Construction

• Black anodized aluminum alloy components for durability and corrosion resistance.
• Uses 5/8" CCV / fuel-grade hose (more durable than typical heater hose).

What’s included

• CCV reroute fittings (billet-style, O-ring seal)
• (2) reroute port plugs
• (1) resonator / intake plug
• Hose + clamps (as listed for this kit)

Fitment

Fits 2004.5–2010 GM 6.6L Duramax:

• LLY (2004.5–2005)
• LBZ (2006–2007)
• LMM (2007.5–2010)

Common applications: Silverado/Sierra 2500HD & 3500HD (2004–2010) with LLY/LBZ/LMM.
Note: “2004” listings typically mean 2004.5+ (LLY), not the earlier LB7.

Install notes (high level)

You’ll remove the factory CCV crossover, install the new O-ring fittings into the valve covers, plug the intake mouthpiece/resonator port, then route the vent hoses down/away from heat and moving parts.