For the 2016 GMC Sierra 1500, both the low-beam and high-beam headlights use a D5S bulb. The supplied fitment data does not identify separate bulb options by headlight style or configuration, so verify the existing headlamp assembly before ordering.
Other useful exterior lighting sizes include 7444NA for the front turn signal, parking light, and rear turn signal. The brake and tail lights use 7444 bulbs, while the rear side marker uses 194NA.
- Reverse light: 921
- Center stop light: 921
- License plate light: 2825
- Trunk light: 921
- Vanity light: 6612F
No fog-light bulb fitment is listed in the supplied data.