For the 2009 GMC Yukon, both the low-beam and high-beam headlights use an H13 bulb. The supplied fitment data does not list a separate fog-light bulb.
The front turn signal and parking light use 4157NA, while the front and rear side markers use 194NA. Reverse-light fitment should be checked against the original bulb: 194 or 7441 is listed for Option 1, while the 7440 listing applies to SLT models under Option 2.
Rear lighting varies by configuration. Denali models use 7443R bulbs for the brake and tail lights and 7443 for the rear turn signal. Hybrid models use 3157R for the brake and tail lights and 3157 for the rear turn signal. The center stop light is listed as LED.
For other lighting, the license plate lamp uses 2825 or 98. Dome, map, and trunk lights use 212-2, while the vanity light uses 6612F.