GMC Terrain Bulb Sizes
2021 GMC Terrain stores 17 bulb-chart rows across 15 lighting positions. LED headlight equipment is stored as its own configuration, not as an extra bulb in the halogen lamps.
Stored halogen, HID, Bi-LED, and LED rows are alternative equipment when the chart lists more than one. A vehicle uses one lighting system. Verify the lamps installed before ordering. A halogen bulb is not the replacement for an LED assembly, and an LED conversion is not shown as the OEM halogen bulb.
Lighting positions
- Fog Light Bulb Front
Stored position. Choose the stored designation.
H11 LED · LED designationH16 LED · LED designation - Headlight Bulb High Beam and Low Beam(with HID headlights)D5SStored position · HID capsuleView on Amazon
- Headlight Bulb High Beam and Low BeamLEDLED headlight configuration · Integrated LED assemblyView on Amazon
- Back Up Reverse Light Bulb921Stored position · Halogen designationView on Amazon
- Brake Light Bulb(with HID headlights)7440RStored position · Halogen designationView on Amazon
- Brake Light BulbLEDLED headlight configuration · Integrated LED assemblyView on Amazon
- Center High Mount Stop Light BulbLEDStored position · Integrated LED assemblyView on Amazon
- Daytime Running Light BulbLEDStored position · Integrated LED assemblyView on Amazon
- License Plate Light Bulb
Stored position. Choose the stored designation.
2825 · Halogen designation98 · Halogen designation - Parking Light Bulb7444NAStored position · Halogen designationView on Amazon
- Side Marker Light Bulb RearLEDStored position · Integrated LED assemblyView on Amazon
- Tail Light BulbLEDStored position · Integrated LED assemblyView on Amazon
- Turn Signal Light Bulb Front7444NAStored position · Halogen designationView on Amazon
- Turn Signal Light Bulb Rear(with HID headlights)7440Stored position · Halogen designationView on Amazon
- Turn Signal Light Bulb RearLEDLED headlight configuration · Integrated LED assemblyView on Amazon
Choose a lighting position to see the stored designation.
Complete bulb chart
| Position | Configuration | Designation | Technology |
|---|---|---|---|
| Fog Light Bulb Front | Stored position | H11 LED | LED designation |
| Fog Light Bulb Front | Stored position | H16 LED | LED designation |
| Headlight Bulb High Beam and Low Beam(with HID headlights) | Stored position | D5S | HID capsule |
| Headlight Bulb High Beam and Low Beam | LED headlight configuration | LED | Integrated LED assembly |
| Back Up Reverse Light Bulb | Stored position | 921 | Halogen designation |
| Brake Light Bulb(with HID headlights) | Stored position | 7440R | Halogen designation |
| Brake Light Bulb | LED headlight configuration | LED | Integrated LED assembly |
| Center High Mount Stop Light Bulb | Stored position | LED | Integrated LED assembly |
| Daytime Running Light Bulb | Stored position | LED | Integrated LED assembly |
| License Plate Light Bulb | Stored position | 2825 | Halogen designation |
| License Plate Light Bulb | Stored position | 98 | Halogen designation |
| Parking Light Bulb | Stored position | 7444NA | Halogen designation |
| Side Marker Light Bulb Rear | Stored position | LED | Integrated LED assembly |
| Tail Light Bulb | Stored position | LED | Integrated LED assembly |
| Turn Signal Light Bulb Front | Stored position | 7444NA | Halogen designation |
| Turn Signal Light Bulb Rear(with HID headlights) | Stored position | 7440 | Halogen designation |
| Turn Signal Light Bulb Rear | LED headlight configuration | LED | Integrated LED assembly |
Replacement check
Read the number on the installed bulb or the housing. Confirm whether the headlights are halogen, HID, or an LED assembly. H11 and H11B are different. 9005 and 9006 are different. This page does not substitute a nearby designation to fill the product list.
Year variations
- Halogen low beam stays H11 across the stored years.
Questions
What fog light bulb does the GMC Terrain use?
2021 stores H11 LED, H16 LED for fog lights.
What turn-signal bulb does the GMC Terrain use?
Halogen-configuration turn signals in 2021 store 7444NA, 7440. An LED-headlight configuration can list LED instead of these bulbs.
What brake-light bulb does the GMC Terrain use?
Halogen-configuration brake lights in 2021 store 7440R.
What does an LED record mean?
A stored part of LED means that configuration is recorded as an LED assembly. It is not a replaceable halogen bulb, and this page does not sell an LED conversion as the OEM bulb for that assembly.
How are HID bulbs handled?
D-series capsules such as D1S or D3S are HID. Exact catalog matches for those positions use HID products, not halogen bulbs.
Can I substitute a nearby bulb number?
No. H11 and H11B stay different. 9005 and 9006 stay different. This page matches the stored designation and does not swap in another bulb to fill the product list.
Does a catalog match guarantee the bulb fits?
A designation match means the product is filed under that bulb number and technology. It does not prove the lamp, socket, or vehicle configuration. Check the bulb in the housing before ordering.
How do I verify the replacement?
Read the number on the bulb or the housing, confirm whether the headlights are halogen, HID, or LED, and match that designation. Position names that say “with halogen headlights” or “with LED headlights” are separate configurations.
Does the GMC Terrain bulb chart change by year?
Bulb rows are stored for 12 years, 2010–2021. This page shows 2021. Choose another year to see that chart. Years are not collapsed into one bulb list.
What does the chart store for headlight bulb high beam and low beam?
2021 stores LED for Headlight Bulb High Beam and Low Beam in the LED-headlight configuration.
What does the chart store for back up reverse light bulb?
2021 stores 921 for Back Up Reverse Light Bulb.
What does the chart store for brake light bulb?
2021 stores LED for Brake Light Bulb in the LED-headlight configuration.
What does the chart store for center high mount stop light bulb?
2021 stores LED for Center High Mount Stop Light Bulb.
What does the chart store for daytime running light bulb?
2021 stores LED for Daytime Running Light Bulb.
What does the chart store for license plate light bulb?
2021 stores 2825, 98 for License Plate Light Bulb.
What does the chart store for parking light bulb?
2021 stores 7444NA for Parking Light Bulb.