Barbie and Blake attempt to build a 2005 Peterbilt 379 Day Cab for the Mid American Trucking Show. In part four, they take apart the dash and paint everything to match the exterior. As well as, install a ton of exterior/interior parts to head out to MATS!! #trucks #truckdriver #gmc #liftedtrucks #trucking #bigrig #mechanic #peterbilt #trending