There was no diesel variant of the full-size SUVs for the 2015-2020 model year versions.2015 Chevy Suburban & Tahoe Live Web Chat: The Recap from GM Authority (September 18, 2013) GM offered another off-road variant or trim for the Suburban and Yukon XL starting with the eleventh generation.GM mulling off-road variants of full-size SUVs from Autobog (September 24, 2013) With the relaunch of the Z71 package in the Suburban for the 2015-2020 models, GM filed papers to trademark the Trail Boss name for use on future Chevrolet truck and SUV models, although they were never used for the Suburban trims."GM files for Z71 Trail Boss trademark" from Autoblog (January 26, 2015)
