For the 1999 Jeep Grand Cherokee, the low-beam headlight uses a 9006XS bulb, while the high beam uses a 9005XS. The supplied fitment data does not identify a headlight-type or configuration-specific variation, so confirm the original bulb before ordering if the vehicle has been modified.
The front fog lights use 9055 bulbs. Front and rear turn signals are fitted with amber 3157A bulbs, while the reverse lights use 3157. Brake and tail lights use red 3157R bulbs, and the center stop light uses a 921.
Other useful replacements include 168 for the license plate light, 194NA for the front side marker, and 906 for the step light. Interior applications include 194 for the glove box and map lights, 214-2 for the courtesy and trunk lights, and 161 for the ash light. Instrument lighting may use either 194 or 2721; compare the original bulb before replacement.