GMC 22692679 Bulb, Back Up Lamp (Trade #921Ll)

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Exterior light bulbs are made up of the following; front turn signal/parking light bulbs, fog light bulbs, center high-mounted stop light, rear brake/tail, turn signal, brake and back-up light bulbs, license plate light bulbs. Interior light bulbs include reading light bulbs, cargo and dome light bulb, and instrument cluster light bulbs. To replace these bulbs follow the steps below. For front turn signal/parking light bulbs remove headlight housing then turn the bulb holder counterclockwise then pull the bulb out straight from its holder then reverse installation by reversing the steps above. In case of any difficulty while replacing a fog lamp bulb, jack stand should be used to raise the front end of the vehicle so as to easily access backside of fender liner. Fender inner liner or splash shield also needs to be removed in order to get access to fog lamp electrical connector. After that counterclockwise rotate it until you can remove it then attach new one and use reverse procedure for remounting all other parts. While replacing center high mounted stop lamp you will need to take upper interior trim panel away from liftgate hence giving space for spoiler mounting screws removal before disconnecting electrical connector prior installing new unit using this same process in reverse order. For rear brake/tail lights, turn signals, brake lights, and backup lamps-open liftgate window first then get upward vision at both screws that hold taillight housing on place before pulling entire assembly outwards followed by turning bulb holder against clockwise direction so as to take off lighting source from socket itself before returning everything back as it was originally organized. Open liftgate and take out two screws holding license plate lens cover until you manage pulling off a little glass with your fingers followed by reversing these steps for installation purposes only if needed (as per user manual). To replace interior lights like reading lamp one should remove its lens which is normally located at front or centre area, then pull out a light bulb thus reversing above described steps. Other types of interior lighting devices such as cargo or dome lights can be repaired by unplugging both leads (they are often located on either side of fixture) after unscrewing lens from each one to get access its socket before returning everything accordingly. Instrument cluster lights need the user to remove the entire instrument cluster in order to reach the bulb socket where they can make small movements using a tiny screwdriver so that it comes off from there and reverse procedure will cover this gap between old installation removed during both disassembly stages.