Find GMC low beam bulb sizes, high beam bulb sizes, fog light bulbs, factory HID bulbs, exterior bulbs, and interior bulb sizes by year and model.
This GMC bulb guide is built for shoppers who need to confirm the correct low beam, high beam, fog light, factory HID, brake light, reverse light, license plate, dome light, and interior bulb sizes before buying an upgrade.
The data currently covers 1958–2026 GMC fitments with 123 indexed model names and 943 year/model applications in the finder.
Start with one of these common GMC model names, or use the selector above to choose your exact year and model.
These bulb sizes appear frequently in the GMC fitment data. Always confirm your exact year and model in the finder before ordering.
Common low beam and fog light size.
Popular high beam and low beam upgrade size.
Common low beam and fog light size.
Common projector headlight bulb size.
Dual-beam headlight bulb size.
Common late-model low beam bulb size.
Common fog light bulb size.
Common fog light and DRL bulb size.
If your GMC came with factory HID headlights, match the exact D-series size shown in the finder. Common factory HID sizes include D1S, D2S, D3S, D4S, D5S, and D8S, plus reflector variants like D1R, D2R, D3R, and D4R.
Once you confirm the correct GMC bulb size, use the Flashtech links in the results to shop LED headlight upgrades, LED fog light bulbs, HID kits, HID replacement bulbs, and common exterior or interior LED bulbs.
Choose your GMC year and model in the finder. The results show low beam, high beam, fog light, factory HID, exterior, and interior bulb sizes when data is available.
No. Some vehicles use one bulb size for both beams, while others use separate low beam and high beam sizes. The finder separates those positions whenever the database has separate fitment data.
Yes. If fog light data is available for your selected vehicle, it appears in the Headlights & Fog Lights section of the results.
That depends on the original lighting system. Halogen vehicles usually use an LED upgrade or HID kit path. Factory HID vehicles should match the exact D-series HID bulb or use a compatible LED upgrade path.