Engineered specifically for 2001 through 2010 Chevrolet Silverado and GMC Sierra 2500HD/3500 trucks powered by the 6.6L Duramax V8 turbo diesel engine (LB7, LLY, LBZ, and LMM codes), the DTech CP3 Pump Mounting Seal Kit (Part # DT660025) supplies the exact replacement O-rings required when servicing or replacing the high-pressure fuel injection pump.

Reusing hardened or flattened factory O-rings during pump maintenance frequently leads to oil leaks at the timing cover interface or fuel weeping into the engine valley. Manufactured by DTech to meet or exceed strict OE specifications (replaces GM part # F00E200093), this essential seal kit guarantees reliable fluid containment with zero core charge.

Key Features & Benefits

• Direct OE Replacement: Engineered to match factory GM specifications for a tight, secure fit on all 2001–2010 Duramax CP3 pump housings.
• Complete Seal Assortment: Includes both the primary CP3 pump mounting O-ring and the pump mount bracket O-ring for a thorough overhaul.
• High-Temperature Material: Constructed from premium rubber compounds designed to withstand continuous engine heat and petroleum exposure.
• Prevents Fluid Leaks: Eliminates annoying oil and fuel seepage around the front cover mount valley.
• Zero Core Charge: Brand-new service component requiring no core deposit or core return shipping.

Technical Specifications

• Manufacturer / Brand: DTech (Dipaco)
• Manufacturer Part Number / SKU: DT660025
• Product Type: CP3 Injection Pump Mounting O-Ring Seal Kit
• GM OE Part Number Interchange: F00E200093
• Truck Compatibility: 2001–2010 GM 2500HD / 3500 Silverado & Sierra
• Engine Platform: 6.6L Duramax V8 Turbo Diesel (LB7, LLY, LBZ, LMM)
• Core Requirement: None
• Warranty: DTech 1-Year Limited Warranty

Vehicle Fitment & Technical Installation Notes

• 2001–2004 GM 2500HD / 3500 Duramax 6.6L (LB7)
• 2004.5–2005 GM 2500HD / 3500 Duramax 6.6L (LLY)
• 2006–2007 GM 2500HD / 3500 Duramax 6.6L (LBZ Classic)
• 2007.5–2010 GM 2500HD / 3500 Duramax 6.6L (LMM)
• Installation Tip: Clean the CP3 mounting bore and timing cover flange meticulously before reassembly. Lightly coat the new DTech O-rings with clean engine oil or assembly lube to prevent pinching or shearing during pump insertion.