For the 2006 GMC Yukon, the high-beam headlight uses a 9005 bulb. Low-beam fitment varies by trim: Denali models use 9005, while SL models use 9006. Confirm the trim before ordering low-beam replacements.
The fog lights use 880 bulbs, and the daytime running lights use 4114. Front turn signals and parking lights also vary by trim, with 3157 listed for Denali and 3157A for SL. The front side marker uses 194NA.
At the rear, the tail and brake lights use 3157R bulbs, reverse lights use 3157, and rear turn signals use 3157. The center stop light is LED. License plate and glove-box lighting may use either 194 or 7441, so compare the original bulb. Interior fitment also varies: courtesy lights may use 168, 917, 561, or 2721; dome lights use 578 or 211-2; and map lights use 161, 578, or 211-2. Compare the original bulb for these options.