View our Specials! Coupon Code: SaveIn2026
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This new Coolant Reservoir (Degas) Cap functions like a factory cap, but features custom Sinister Diesel looks. The cap fits OEM or Sinister Diesel Coolant Reservoir for the 2001-2016 GM Duramax. 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. Available in gray or Sinister Blue, this cap looks as good as it works!., Features: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;Includes:(1) Sinister Diesel Coolant Reservoir Cap.
| Years | Make | Model | Trim | ||
|---|---|---|---|---|---|
| 2001 - 2005 | Chevrolet | Silverado 2500 HD | Base | ||
| 2001 - 2006 | Chevrolet | Silverado 2500 HD | LS | ||
| 2001 - 2016 | Chevrolet | Silverado 2500 HD | LT | ||
| 2004 - 2016 | Chevrolet | Silverado 2500 HD | WT | ||
| 2007 - 2016 | Chevrolet | Silverado 2500 HD | LTZ | ||
| 2015 - 2016 | Chevrolet | Silverado 2500 HD | High Country | ||
| 2001 - 2005 | Chevrolet | Silverado 3500 | Base | ||
| 2001 - 2006 | Chevrolet | Silverado 3500 | LS | ||
| 2001 - 2006 | Chevrolet | Silverado 3500 | LT | ||
| 2004 - 2004 | Chevrolet | Silverado 3500 | WT | ||
| 2006 - 2006 | Chevrolet | Silverado 3500 | WT | ||
| 2007 - 2016 | Chevrolet | Silverado 3500 HD | LT | ||
| 2007 - 2016 | Chevrolet | Silverado 3500 HD | LTZ | ||
| 2007 - 2016 | Chevrolet | Silverado 3500 HD | WT | ||
| 2015 - 2016 | Chevrolet | Silverado 3500 HD | High Country | ||
| 2001 - 2016 | GMC | Sierra 2500 HD | SLT | ||
| 2001 - 2016 | GMC | Sierra 2500 HD | SLE | ||
| 2001 - 2002 | GMC | Sierra 2500 HD | SL | ||
| 2002 - 2005 | GMC | Sierra 2500 HD | Base | ||
| 2003 - 2014 | GMC | Sierra 2500 HD | WT | ||
| 2006 - 2006 | GMC | Sierra 2500 HD | SL | ||
| 2011 - 2016 | GMC | Sierra 2500 HD | Denali | ||
| 2015 - 2016 | GMC | Sierra 2500 HD | Base | ||
| 2007 - 2007 | GMC | Sierra 2500 HD Classic | SL | ||
| 2007 - 2007 | GMC | Sierra 2500 HD Classic | SLE | ||
| 2007 - 2007 | GMC | Sierra 2500 HD Classic | SLT | ||
| 2007 - 2007 | GMC | Sierra 2500 HD Classic | WT | ||
| 2001 - 2002 | GMC | Sierra 3500 | SL | ||
| 2001 - 2006 | GMC | Sierra 3500 | SLE | ||
| 2001 - 2006 | GMC | Sierra 3500 | SLT | ||
| 2002 - 2005 | GMC | Sierra 3500 | Base | ||
| 2004 - 2006 | GMC | Sierra 3500 | WT | ||
| 2006 - 2006 | GMC | Sierra 3500 | SL | ||
| 2007 - 2007 | GMC | Sierra 3500 Classic | SL | ||
| 2007 - 2007 | GMC | Sierra 3500 Classic | SLE | ||
| 2007 - 2007 | GMC | Sierra 3500 Classic | SLT | ||
| 2007 - 2007 | GMC | Sierra 3500 Classic | WT | ||
| 2007 - 2014 | GMC | Sierra 3500 HD | WT | ||
| 2007 - 2016 | GMC | Sierra 3500 HD | SLT | ||
| 2007 - 2016 | GMC | Sierra 3500 HD | SLE | ||
| 2011 - 2016 | GMC | Sierra 3500 HD | Denali | ||
| 2015 - 2016 | GMC | Sierra 3500 HD | Base |
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For more information on Sinister Diesel part number SD-DC-DMAX-01, you can visit the official Sinister Diesel website.
