The source of the 2021 Sierra 3500HD's prodigious power is a 6.6-liter V8 gasoline engine that's been modulated for 401 hp and 464 lb-ft. A 6-speed automatic transmission is appointed to manage ...
Take one look at this GMC Sierra 3500HD Denali Crew Cab truck and you’ll quickly realize just how special of a machine this is. Despite being three years old with 14,000 miles on the clock, it just ...
Nationally, drivers who switch save $900 on average.
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