question

  1. R

    04 Z71 Should I tune it?

    Ok, so Im kinda new to tuning in general and I wanna know a good programmer/tuner to buy because I want to get more MPG and generally more power from the 5.3 but Im kinda unsure due to it having 290,000 miles on it. Should I tune it, if so which programmer should I buy.
  2. T

    First time rebuilding a 8.6

    Hi y’all this is my first time rebuilding my 8.6 in my 2003 Tahoe 5.3. I’ve re-geared to a 4.11 and am setting my patterns. I’ve got my backlash at 9 thow and this is my first pattern. Is this acceptable or what changes should be made.

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