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

1999-2007 (1st Gen) GMC Sierra Light Bulb Sizes

Front Lights

  • Daytime Running Light Bulb:
    • 3157-SCK
    •  4114K
  • Front Fog Light Bulb: 9145
  • Front Sidemarker Light Bulb: 194
  • Front Turn Signal Light Bulb:
    • 3157-SCK
    • 4157NAK
  • High Beam Headlight Bulb: 9005
  • Low Beam Headlight Bulb: 9006

Rear Lights

  • Back Up Light Bulb: 3
    • 157-SCK
    • 3157K
  • Brake Light Bulb
    • 3157-SCK
    • 3157K
  • Center High Mount Stop Light Bulb: 921
  • License Plate Light Bulb: 194
  • Parking Light Bulb:
    • 3157-SCK,
    • 4157NAK
  • Rear Sidemarker Light Bulb: 194
  • Rear Turn Signal Light Bulb:
    • 3157-SCK
    •  3157K
  • Tail Light Bulb:
    • 3157-SCK
    •  3157K
  • Tailgate Light Bars: vbf-tailgate-light

Interior Lights

  • Courtesy Light Bulb:
    • 194
    • 74
  • Dome Light Bulb:
    • 211-2
    •  578
  • Glove Box Light Bulb: 194
  • Luggage Compartment Light Bulb: 912
  • Map Light Bulb: 578

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