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2009 GMC Crew 5.3 Flex Fuel

Discussion in 'Performance & Fuel' started by amusgrave, Aug 4, 2009.

  1. amusgrave

    amusgrave New Member

    HI! I just bought a new GMC Sierra CrewCab Z71 with a 5.3 Flex Fuel & Active Fuel Management, im looking for a programer or the best custom tune program out there! I ordered a new ECM so I can keep my factory warranty, So i wanna make this baby run! Any help?
  2. 2ToNe04

    2ToNe04 Epic Member 5+ Years 1000 Posts

    get a blackbearperformance tune, best bang for your buk you go beyong the little programmer your going to buy trust me.

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