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Conversation Between finalday7 and TexAg95

1 Visitor Messages

  1. Hello. I noticed that you responded to a post a few years ago and said you had a Hypertech Max Energy Programmer. I have a 2007 GMC (new body style) 5.3 V8 and was considering this exact same tuner. Did you see some performance and MPG gains and if so about how much? Thanks for the info!
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