what are gmc truck trim levels?
["An Innovative New Tailgate. The one feature that has caught everyone's attention is the new cargo tailgate. ... ", 'Configuration Overview. For 2019, there are six trims, two drivetrains, three cab configurations, and five engine options for the GMC Sierra 1500. ... ', 'Sierra Trim. ... ', 'SLE. ... ', 'Elevation. ... ', 'SLT. ... ', 'AT4. ... ', 'Denali.']