Light bulb size Pulling out the socket of the light bulb from the headlight assembly.

2018-Present GMC Terrain Light Bulb Sizes

Front Lights

  • Daytime Running Light Bulb: LED
  • Front Fog Light Bulb: H11LL
  • Front Turn Signal Light Bulb: 7444NA
  • High Beam and Low Beam Headlight Bulb: HID-D5S
  • High Beam Headlight Bulb: LED
  • Low Beam Headlight Bulb: LED

Rear Lights

  • Back Up Light Bulb: 921
  • Brake Light Bulb:
    • 7440LL
    •  LED
  • Center High Mount Stop Light Bulb: LED
  • License Plate Light Bulb: 2825L
  • Parking Light Bulb: 7444NA
  • Rear Sidemarker Light Bulb: LED
  • Rear Turn Signal Light Bulb:
    • 7440LL
    • LED
  • Tail Light Bulb: LED

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