2001-2010 Duramax Degas Coolant Reservoir Cap (SD-DC-DMAX-01)

This new Coolant Reservoir (Degas) Cap functions like a factory cap but features custom Sinister Diesel looks. It is made from CNC machined, solid billet T6-6061 aluminum with an interior pressure relief system, so it will continue to function even in case of a gasket failure. Then for the finishing touch, it has been anodized in Sinister Blue. This cap truly looks as good as it works! 

Part Number: SD-DC-DMAX-01 / SD-DC-L5P /SD-6.6DC01-GRY

• Cap is rated for 15 PSI
• Available in Anodized Sinister Blue or Gray
• CNC Machined from T6-6061 Billet Aluminum
• Etched Sinister Diesel Logo
• Replacement for failure-prone factory cap
• Fits 2001-2016 GM Duramax Coolant Reservoirs
• 1-Year Warranty

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• ?

  Does it vent at 15psi or 20psi ?

  15psi

• ?

  Can the coolant cap let the coolant drain out

  This is specifically designed to avoid that.