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#13
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My '05 GMC Duramax gets 15-16 towing(open car trailer) or empty.... driving like an idiot. The truck has an Edge products programer(which I keep cranked up.. LOL) aftermarket exhaust and an Airaid air intake. I am also running a 285/70R17 tire. The truck turns a mid 14 1/4 mile and pulls like a frieght train...
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