you need to remove the lampshade from the roof trim trim, but this can damage the plastic lampshade clips and scratch the surface of the trim. Therefore, to remove the lampshade, it is more convenient to remove the trim assembly with the lampshade, and then detach the lampshade from the trim. To do this, perform the following operations.
1. Disconnect the wire from the negative terminal of the battery.
2. Pry up the rear edge of the roof trim...
3. ...and move it away from the upholstery.
4. Disconnect the wiring harness connector from the ceiling light connector.
5. Press the plastic retainer...
6. ...and disconnect the wiring harness connector from the holder on the trim.
7. Disconnect the microphone wire harness connectors and remove the trim assembly with the lampshade.
8. From the inside of the lining, press the retainer...
9. ...and detach the lampshade from the trim.
10. Install the interior light in the reverse order of removal.
[The source of the article is available on the website: ChevyMan]