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Fuel economy:14 cty/19 hwy
What's New for 2013 For 2013, the GMC Sierra 1500 is essentially unchanged.
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2013 GMC Sierra 1500 Extended Cab
Fuel economy:15 cty/20 hwy
What's New for 2013 For 2013, the GMC Sierra 1500 is essentially unchanged.
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2013 GMC Sierra 1500 Regular Cab
Fuel economy:15 cty/20 hwy
What's New for 2013 For 2013, the GMC Sierra 1500 is essentially unchanged.
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Fuel economy:18 cty/24 hwy
What's New for 2014 Redesigned for 2014, the GMC Sierra benefits from weight reduction and a lineup of new, more fuel-efficient engines including a now-competitive V6.