A method of and system for delivering parcels or packages utilizing a parcel delivery truck. The method allows both lighter and heavier packages to be delivered by a single driver or operator. The method includes positioning a specially designed lift or hoist unit within a rear compartment of a parcel delivery truck. The left and right portions of the lift unit are mounted to left and right side walls of the rear compartment to provide maximum lifting efficiency and maximum space for heavier parcels carried in the rear compartment.