Does the 2015 GMC Denali engine come in 2 different sizes? If so, is there one that is more fuel efficient? What is that one?

Asked by Mar 28, 2015 at 06:05 PM about the 2015 GMC Yukon Denali 4WD

Question type: Shopping & Pricing

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The Denali comes with either a5.3 (L83) or a 6.2 (L86) The 6.2 will be the better bet only if you don't have a lead foot. Bigger motor (more horse power) doesn't have to work as hard to pull the heavier weight

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