2019 Sierra 1500 Limited. 2019 GMC Sierra 1500 Limited Base, SLE 5.3L V8 - Flex, 5.3L V8 - Gas. 2019 GMC Sierra 2500 HD Base, Denali, SLE, SLT 6.0L V8 - CNG, 6.0L V8 - Flex, 6.0L V8 - Gas. 2019 GMC Sierra 3500 HD Base, Denali, SLE, SLT 6.0L V8 - CNG, 6.0L V8 - Flex, 6.0L V8 - Gas.
