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Type: Posts; User: speed_demon

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  1. Replies
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    I thought the 5.3 had AFM but no VVT and the 4.8...

    I thought the 5.3 had AFM but no VVT and the 4.8 had VVT and no AFM. Learn something new every day.
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    I don't think the 5.3 had VVT in 2012.

    I don't think the 5.3 had VVT in 2012.
  3. Newb confused about Gear/Tire Wizard and Speedo

    When I opened the Gear/Tire Wizard it says Gear Ratio = 3.73. I bought this truck new and it came with 3.42 gears and the RPO codes confirms GU6 which is 3.42. Then I open the Speedo window and it...
  4. No brainer changes on a 2007 GMC Envoy 5.3

    I'm a newb to tuning and I lent my buddy my tuner. I was hoping more experienced tuners could tell me the "no brainer" changes he should make to his stock 2007 GMC Envoy 5.3 before I get it back. ...
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    I'm glad I asked and I will definitely play it...

    I'm glad I asked and I will definitely play it safe. I would like to learn more about the levels of programming. I assumed if I had the same service tag # it would have the same slave os and I...
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    Keep my stock ECM as backup?

    I bought a MPVI2 tuner and I have been familiarizing myself with the software with files from the tune repository. I?m afraid to jump in on mine unless I have a spare ECM to fall back on as this is...
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