Primer Pump Bulb Assembly for Duramax 6.6L Diesel LB7 LBZ LLY LMM – Fits Chevrolet Silverado

Duramax 6.6L Primer Pump Bulb Assembly

This primer pump bulb assembly kit is designed for 2004.5–2013 GM Duramax 6.6L diesel engines, including LB7, LBZ, LLY, and LMM variants. It restores fuel pressure, improves cold starts, and ensures clean fuel delivery. Compatible with Chevrolet Silverado models.

Kit Components

• 1 x TP3018 Fuel Filter – 5 micron, multi-layer media, 98% water separation
• 1 x 12642623 Fuel Filter Head – Billet aluminum, corrosion-resistant, includes heater plug and metal bleeder screw
• 1 x 12639277 Water-in-Fuel Sensor – 8-sided design, alerts ECU/dashboard when water is detected

Fitment Compatibility

• Chevrolet Silverado 2500HD / 3500HD (2004.5–2013)
  
• May fit 2002–2004 models with hose modification

Key Benefits

• Restores fuel system pressure and priming function
• Improves cold start reliability and fuel filtration
• Durable billet aluminum construction resists corrosion
• Includes upgraded metal bleeder screw for longevity

Installation Notes

• Direct bolt-on for 2004.5–2013 Duramax 6.6L engines
• 2002–2004 models require hose length adjustment
• Professional installation recommended

Restore Fuel System Performance

This kit is ideal for replacing worn or leaking primer bulbs and filter heads. It ensures clean fuel delivery, protects injectors, and improves engine response.