2016 GMC Sierra 1500 Denali 6.2L V-8 4×4 Tested: The One with Eight Speeds

The spread of General Motors? eight-speed automatic transmission through the GMC Sierra 1500 lineup is nearly complete. Introduced to the Sierra in 2015 paired only with the biggest engine available, a 420-hp 6.2-liter V-8, the eight-speed has since become an option on certain Sierras equipped with the 5.3-liter V-8, tracing a path through the Sie...

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