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?
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
Get More Money for Your CarBe seen by 20 million shoppers. Create Your Free Listing
Search GMC Yukon Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
GMC Yukon Experts