1994 GMC Suburban Owner's Manual - Page 300

3. Pull the bulb straight out of the socket. 4. Put a new bulb into the socket and push it in until it istight. 5. Put the socket back into the side marker assembly and turn it to the right to tighten it. 6. Replace the parkinghrn signal light assembly and tighten the screws. Roof Marker Lights 1. Remove the screws and lift off the lens. 2. Pull the bulb straight out of the socket. 3. Put a new bulb into the socket and push it in until it is tight. 4. Redace the lens and tighten the screws. 6-54