How do you replace the headlight bulb located on a 1986 Oldsmobile Ciera?

The '86 Cutlass Ciera had sealed beam headlights. You need a Torx driver to take the decorative frame around the headlights off first, and then a Philips head screw driver to take the bezel around the actual bulb off. Unscrewing the bezel frame allows the bulb to come out. It will still be attached of course to the socket and wires connecting it to the car's battery. Simply unplug this and insert a new sealed beam headlight.

To adjust the headlights, use a Torx driver on either of the two Torx bolts that pitch the headlamp up/down or left/right. These bolts are usually part of a light blue (or potentially gray) small truncated, triangular looking piece of plastic (which break easily). The head of these bolts fits onto notches on the bezel.