2019 GMC 2500
This GMC Sierra 2500HD boasts a Turbocharged Diesel V8 6.6L/403 engine powering this Automatic transmission. TRANSMISSION, ALLISON 1000 6-SPEED AUTOMATIC, ELECTRONICALLY CONTROLLED with overdrive, electronic engine grade braking and tow/haul mode, SUNROOF, POWER, DENALI... via CarSoup