1998 GMC Sonoma Owner's Manual - Page 290

Taillamps 1. Open the tailgate. Windshield Wiper Blade Replacement 2. Remove the screws from the lamp assembly near the tailgate latch. See "Normal Maintenance Replacement Parts" in the Index for the proper type of replacement blade. I NOTICE: Use care when removing installing a blade or assembly. Accidental bumping can cause the arm to fall back and strike the windshield. I . To remove the old wiper blades, lift the wiper arm until it locks into a vertical position. 3. Pull the assembly away from the pickup side panel. 4. Turn the socket to the left to remove it. Push the tab in while you turn the socket. 5. Pull the bulb out. 6. Push the new bulb into the socket. 7. Put the socket into the assembly and turn the socket to the right until it locks in place. 8. Replace the assembly. Install and tighten the screws. 9. Close the tailgate.