Cars come with built in spaces for storage of good and other luggage. The trunk hatch is located at the rear end of the car and is the tool that gives access to the storage compartment. The Buick Rainer trunks may or may not come with built in tail lights and if so it is considered to be very heavy in weight. The Buick Rainer trunk or hatch made of fiber glass or carbon fiber is said to be a lightweight trunk that many drivers today opt for. These hatches or the fiberglass hatches are easily bolted on with the regular factory latches and bolts. The Buick Rainer Trunk hatch is a lightweight hatch making driving more smooth and easy.