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m1c

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About m1c

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  • Name
    m1c
  • Location
    Tennessee
  • Drives
    2018 Sierra
  1. Hello! This is my first post here and I could use some help. I have a 2018 Sierra 5.3 4x4 with the 6 speed auto that I recently installed a whipple supercharger kit on. I noticed today that the byapss valve is sticking open after i shut the truck off. When in neutral or park when i punch the throttle the valve doesn't close either. Has anyone else had this problem with the whipple? If so, how did you fix it?
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