2017 GMC Sierra Denali 1500

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Most base and SLE Sierra 1500s come standard with a 285-hp 4.3-liter V-6 engine and a six-speed automatic transmission; a 355-hp 5.3-liter V-8 that’s also connected to a six-speed automatic is optional,but it’s standard on base and SLE Sierra 1500 double-cab models with the 6.5-foot bed.


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