Re: "Most for the money" performance addition to a 5.3 '00 Sierra
Well if you want a good tune it comes down to the tuner.
Justin over at Blackbear seems to be one of the best mail order tuners you can get.
Blackbear> Wheatley > Nelson
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1972 GMC C10
Last edited by Manbearpig; 08-25-2009 at 11:43 PM.
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