To change the headlight bulb in your 2007 Buick Rendezvous, open the hood and find the headlamp housing retainer clip for the bulb you need to replace. The retainer clip is on the inner-top corner of the housing. Press inward on the headlamp housing to relieve the pressure on the clip, then partially pull the clip out. Unscrew the wing-stud retainer at the outer-top corner of the housing and pull the housing forward out of the grille. Rotate the bulb clockwise 90 degrees and pull it from the housing. Lift up on the lock tab, then disconnect the electrical connector from the terminal on the plastic bulb base.
Being careful not to touch the bulb glass with your bare fingers, snap the new bulb into place on the electrical connector. Oil from your fingers can cause premature bulb failure. Install the bulb into the housing and rotate it 90 degrees counterclockwise to lock it in place. Line up the housing with its retainer holes in the grille, then push it inward to snap it into place. Push the retainer clip into place and install the wing-stud.
The 2007 Rendezvous uses No. 9005 bulbs for high beams and No. 9006 for low beams. These are generic bulbs that you can purchase at any auto supply. Bulbs have a finite life, so if one has failed its mate is probably not far behind. It's a good idea to replace them in pairs.
