The 2004 Trailblazer EXT LS features a 4.2-liter inline 6-cylinder engine with a 4-speed automatic transmission with overdrive. Newly available for 2004 was GM's Autotrac 4WD. The EXT LS model comes standard with third row seat, dual zone climate control, cruise control, keyless entry, lumbar seats and a nice list of power controls. Very clean local trade with new Goodyear tires.