The standard features of the Chevrolet Silverado 6500HD 1WT include Duramax 6.6L V-8 350hp intercooled turbo engine, 6-speed automatic transmission with overdrive, 4-wheel anti-lock brakes (ABS), Side seat mounted airbags, Curtain 1st row overhead airbag, Airbag occupancy sensor, Air conditioning, 19.5" steel wheels, Cruise control, ABS traction control, StabiliTrak w/Proactive Roll Avoidance electronic stability