Mishimoto 01-07 Chevy/GMC 6.6L Duramax Degas Tank - BlackTwo decades of heat cycling plastic components, such as your factory degas tank, will undoubtedly make them brittle and discolored. If your factory plastic degas tank is leaking, you're sick of seeing that ugly yellow plastic, or want to go single big turbo and need more space, then look no further. The Mishimoto aluminum degas tank for 2001 2007 Chevy GMC 6. 6L Duramax (LB7 LLY LBZ) solves all these problems. Designed with durability, style, and