what are the gmc yukon trim levels?
['Trim: SLE. Shop Now. SLE 4x2. Starting at $50,600. 355-hp, 5.3-liter V-8 (regular gas) ... ', 'Trim: SLT Standard Edition. Shop Now. SLT Standard Edition 4x2. Starting at $54,800. ... ', 'Trim: SLT. Shop Now. SLT 4x2. Starting at $57,800. ... ', 'Trim: Denali. Shop Now. Denali 4x2. Starting at $67,700.']