Abstract: A standard truck chassis has a common support on the rear end of its main frame for a lower extensible and retractable vehicle deck and for a lower deck stabilizer unit which is also employed to tilt the lower deck following its rearward extension. Another support rising from the chassis main frame behind the truck cab pivotally supports the forward end of an upper vehicle deck positioned over the lower deck and the rear end of an over-cab vehicle deck. Power devices are provided to tilt the upper vehicle deck and the over-cab deck at proper times during vehicle loading and unloading operations. Three vehicles can be carried bodily on the three decks of the transporter and a fourth vehicle can be towed by the stabilizer unit.