Thread: ECM Reprogramming
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Old 04-19-2011, 09:54 PM   #14
chevydog66
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Join Date: Oct 2003
Location: Fort Wayne, IN.
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Re: ECM Reprogramming
www.speartech.com is another option for harness mods and tuning. John did my 01 6.0 in 72 GMC truck with performance tune.
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