What do LS, LT, and LTZ Stand For? LS, LT, and LTZ all represent different trim levels on Chevy and GMC trucks. Trim levels reflect the engine, interior, electronic, and other exterior design features that a specific truck model has. Chevy is known for having an extensive line of trim levels that can vary from year to year and truck to truck. For example, 2020 Silverado's … [Read more...] about What do LS, LT, and LTZ Mean?