1997 GMC Suburban Owner's Manual - Page 324

3. Pull the bulb straight out of the socket. Center High-MountedStoplamp (CHMSL) The individual bulbs i n the CHMSL are not replaceable. See your dealer for assistance. Roof Marker Lamps I . 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 i n u n t i l it is tight. 4. Replace the lens and tighten the screws. 4. Put a new bulb into the socket and push it in until it is tight. Put the socket back into the sidernarker assembly and turn it to the right to tighten it. Replace the parking/turn signal lamp assembly and tighten the screws. 6-42