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I rent the penske versions of this truck it's a 2012-2013 gmc 5.7V8 with a 16' box. Or a 12' box.
My best tank with that monster was 21.2MPG EOC P&G. Over 453 miles. yes automatic. And I haven't ever seen the vacuum gauge. They should write on it too put it in manual mode and upshift constant.
Not a bad truck.
But a better wagon.
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