For the 2002 Chevrolet Blazer, the supplied fitment data lists a 9005 bulb for the high-beam headlight. No low-beam bulb is specified in the available data, so verify the original bulb before ordering a low-beam replacement. The fog lights use 881 bulbs.
Other useful exterior fitments include 3157 for the front turn signals and parking lights, 3057R for the brake and tail lights, and 3057 for the rear turn signals. The reverse lights use 3156, while the front side markers use amber 194NA bulbs. The center stop lamp is listed as LED.
Interior and utility lighting has several listed options. License plate, ashtray, and glove-box locations may use 194 or 7441 bulbs. The dome light requires comparison with the original bulb: the listed options are 562 and 564. Map-light options are likewise configuration-dependent, with 194, 7441, or 212-2 listed.