How do you change the right passenger side headlight bulb on a 1998 Pontiac Grand Prix?
Open the hood and look for two small bolts right on top. These two bolts hold the entire light assembly in place (headlight and turn signals). Remove these two bolts. Next, carefully wiggle the light assembly forward and out. The light assembly has a little tab that slides into the framing so be careful not to damage this. Once the light assembly is out, detach the wiring attached to the assembly and unclip the wiring to the headlight bulb. Remove the large round black plastic nut that holds the bulb in place by pushing in and turning. Remove the old bulb and install the new one. Don't touch the glass bulb with your fingers because the oil from your fingers can cause the reduce the lifetime of the bulb (see instructions on the bulb packaging). Reattach the large round black plastic nut that holds the bulb in place by pushing in and turning. Reattach the headlight wiring clip. Carefully slide the light assembly tab into place and reattach the assembly with the bolts that you removed. The driver and passenger sides are replaced in the same way. I have done this a couple times on mine including the first time when I removed half the engine compartment! A problem that tends to happen to these older cars is the headlight cover falling off. If this happens you should replace the headlight module. If you don't the bulbs will continue to fail since any little rock from the road will break them. Mine has 151k miles on it and both covers fell off in the span of about 3 weeks. I recently replaced both headlight modules. I posted this fix also. This car has run very well for us so we'll probably keep it for a long time(GTP really goes fast and the engine has been extremely reliable).