For the 2012 Chevrolet Traverse, the low-beam headlights use H11 bulbs, while the high-beam headlights use 9005 bulbs. The daytime running lights also use 9005 bulbs, so the high-beam and DRL applications share the same listed size.
Front turn signals and parking lights use 4157NA bulbs. The front side markers use 194NA bulbs, while the rear side markers use PC195 bulbs. At the rear, the brake and tail lights use 7443R bulbs, and the rear turn signals use 7443 bulbs. Reverse lights take 912 bulbs.
The center stop light and license plate lights are listed as LED applications rather than replaceable bulb sizes. Interior listings include 168 or 917 for the map lights, 194 or 7441 for the glove box, 6411 or 6428 for the trunk, and 6612F for the vanity light. Match replacement parts to the specific lamp position and verify the existing socket before ordering where multiple sizes are listed.