How do you remove interior trim in 1989 GMC 1500 step-side to repair headliner?

To remove the interior trim in a 1989 GMC 1500 step-side for headliner repair, start by carefully prying off any plastic trim pieces using a trim removal tool to avoid damage. Next, locate and remove any screws securing the trim, which are often hidden under small covers or behind other panels. Once the screws are out, gently pull the trim away from the roof, taking care to disconnect any clips or wiring if applicable. Finally, set the trim aside for easy access while you repair the headliner.