
SEALIGHT H10/9145/9140 LED Fog Light Bulbs, 6000K Xenon W...
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Used for: Fog Light Bulb Front
Used for: Headlight Bulb High Beam
Used for: Headlight Bulb Low Beam
Used for: Back Up Reverse Light Bulb
Used for: Brake Light Bulb, Tail Light Bulb
Used for: Center High Mount Stop Light Bulb
Used for: Daytime Running Light Bulb
Used for: License Plate Light Bulb, Courtesy Light Bulb(Compare to original - Option 1), Glove Box Light Bulb
Used for: Parking Light Bulb, Turn Signal Light Bulb Front
Used for: Side Marker Light Bulb Front, Side Marker Light Bulb Rear
Used for: Turn Signal Light Bulb Rear
Used for: Courtesy Light Bulb(Compare to original - Option 2)
Used for: Dome Light Bulb(Compare to original - Option 1), Map Light Bulb
Used for: Dome Light Bulb(Compare to original - Option 2)
Used for: Trunk or Cargo Area Light
This page helps you find the correct bulb sizes for the 2004 GMC Sierra 1500 by lighting position, so you can match the right bulb to the right socket without guesswork. Whether you are replacing a burned-out headlight, a tail lamp, or a small interior bulb, checking the bulb chart by location is the easiest way to verify fitment before you buy.
For the 2004 GMC Sierra 1500, the listed bulb sizes cover common exterior and interior lights such as low beam and high beam headlights, turn signals, brake lights, reverse lights, license plate lights, dome lights, and more. Because trim and lighting equipment can vary, this year page is a practical starting point for confirming the bulb type used in your specific truck.
Fitment can differ depending on trim, body style, and lighting package, so it is smart to compare the bulb on the truck with the chart before ordering. Some owners choose halogen replacements, while others upgrade to LED bulbs or aftermarket conversion kits for brighter output or a different color temperature. If you are changing from halogen to LED, make sure the bulb base, polarity, and physical clearance are compatible with the housing. For the best results, check the installed bulb number before purchase, especially on lights that may have been changed by a previous owner or modified with non-original parts.
The low beam headlight bulb listed for the 2004 GMC Sierra 1500 is 9006.
The high beam headlight bulb listed for the 2004 GMC Sierra 1500 is 9005.
Both the front turn signal light and the front parking light are listed as 4157NA for the 2004 GMC Sierra 1500.
The rear turn signal bulb is listed as 3157A, and the brake light bulb is listed as 3157R.
The tail light bulb listed for this truck is 3157R.
The center high mount stop light bulb is listed as 921.
The license plate light bulb listed for the 2004 GMC Sierra 1500 is 194.
The back up reverse light bulb listed for this model is 3157.
The front side marker light bulb is listed as 194NA, and the rear side marker light bulb is also listed as 194NA.
The fog light bulb listed for the front fog lamp is 9145 LED.
The daytime running light bulb listed for the 2004 GMC Sierra 1500 is 4114.
The map light bulb is listed as 578. The dome light may use 578 or 211-2 depending on the original setup, so it is important to verify the bulb already installed in your truck.
The glove box light bulb is listed as 194. Courtesy light fitment may vary, with one listed option using 194 and another listed option using 2721.
Because trim and lighting package differences can change fitment, and some trucks may have been modified or repaired with non-original bulbs. Checking the installed bulb helps confirm the correct size before you order.