GMC 5973931 Headlight Capsule

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Adjustment screws are provided at the front of the lamp to alter the lamp beam in both the horizontal and vertical planes. It is strongly recommended that this work is left to a service station having modern beam setting equipment, any adjustment at home being regarded as a temporary, emergency operation. With the headlights in the 'full on' position, reach up under the dashboard and depress the lighting switch shaft retainer while pulling gently on the lighting knob. Remove the shaft and knob assembly. Remove the nut which secures the-lighting switch to the carrier. For better access to the switch, remove the screws which secure the instrument cluster carrier and tilt the cluster. Unplug the electrical connector at the switch and remove the switch. Installation Is a reversal of removal. however, make sure that all ground connections are refastened and that the switch shaft is fully seated in the switch. The shaft retainer should lock the shaft into place. Disconnect the negative battery cable. Remove the cluster pad assembly. Remove the retaining screws and pull away the switch.

Plug the new seal beam into the electrical connector, hold the seal beam in place and install the retaining ring, then install the headlight bezel.

First remove the headlight bezel (outer trim around seal beam), then remove the headlight bulb retaining ring.

After removing the headlight bezel and decorative bezel, you should remove the retaining ring screws and withdraw the ring while supporting the light.