The modular headliner consists of a one-piece composite substrate covered with a foam cloth facing. The construction of the composite substrate does not allow for replacement of the cloth facing and requires that the headlining substrate and cloth be serviced as a complete assembly. The wiring harness for roof lighting and the sunroof, if equipped, is attached to the back of the headliner and can be serviced separately. The headlining is held in place in the rear by a magnet attached to the headliner. Additional support is provided in the front by the auxiliary sunshades and interior attachments. If equipped with a sunroof, there will be dual lock material at the front of the sunroof opening and magnets at the rear of the sunroof opening. If a sunroof locator, such as a magnet, separates from the sunroof during servicing, obtain a locator repair kit through GM SPO.