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5.3

  1. I know, I know...Supercharger. Hear me Out

    Engine & Performance
    I get it. "UsE thE SeaRCh fuNcTioN!" I have. Here. On the Google-nets. On other forums, including performance truck, and even asked Whipple and Procharger directly. Been there. Still can't find info I'm after, or it's from 10 years ago, or I'm not understanding it...which could be possible...
  2. Pop when switching to V4

    General GM Discussions
    Hello, recently my 2007 GMC Sierra 1500 5.3L NNBS has developed an issue While driving at relatively low speeds there is a distinct pop sound when switching out of V8 and into V4 mode. it is intermittent and only seems to happen while traveling under 30 MPH. I have been doing research...
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