The GMC Denali nameplate started as the luxury version of the Yukon for the 1998 model year. The Denali is available on both standard and XL versions, and is the top-of-the-line trim in the GMC Yukon lineup. Some model years of the GMC Yukon Denali have keyless entry remote fob smart keys that are onboard programmable, which means a person can program the keyless entry remote fob smart key with no special equipment other than the keyless entry remote fob smart key programming instructions. However, other model years are not onboard programmable and require special equipment in order to program the keyless entry remote fob smart key.