
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, Turn Signal Light Bulb Rear
Used for: Side Marker Light Bulb Front, Side Marker Light Bulb Rear
Used for: Ash Tray Light Bulb
Used for: Courtesy Light Bulb(Compare to original - Option 2)
Used for: Dome Light Bulb(Compare to original - Option 1)
Used for: Dome Light Bulb(Compare to original - Option 2)
Used for: Engine Compartment Light Bulb
Used for: Map Light Bulb
Used for: Trunk or Cargo Area Light
This page helps you verify the bulb sizes for the 2004 Chevrolet Silverado 1500 by lighting position, so you can match the correct replacement before you buy. Whether you are changing a headlight, a tail lamp, or a small interior bulb, checking the exact socket location is the easiest way to avoid ordering the wrong part.
For this Silverado 1500, the bulb chart covers exterior, interior, and utility lights used across different trim and body configurations. Use the listed positions to confirm the right fit for your truck, especially if you are replacing multiple bulbs at once or comparing original halogen bulbs with LED options.
Fitment can vary by trim, lighting package, market, and body style, so it is smart to confirm the bulb already installed in your truck before placing an order. Some positions may use standard halogen replacements, while others may be converted to LED aftermarket bulbs, which can change brightness, color, and sometimes compatibility. If your Silverado has been modified with non-OEM lamps or conversion kits, the bulb number in the chart may not match what is currently installed, so a quick visual check is always the safest step.
The low beam headlight bulb size listed for the 2004 Chevrolet Silverado 1500 is 9006.
The high beam headlight bulb size is 9005.
The center high mount stop light bulb size is 921.
Both the front turn signal light and the front parking light use 3157A.
The rear turn signal light and tail light bulb size is 3157R.
The brake light bulb size is 3157R.
The back up reverse light bulb size is 3157.
The daytime running light bulb size is 4114.
The license plate light bulb size is 194.
The map light bulb size is 168, and the glove box light bulb size is 194.
The chart lists two dome light options: 578 and 211-2, depending on the original setup.
The front fog light bulb is listed as 9145 LED, but aftermarket conversions and prior modifications can affect fitment. Check the installed bulb and connector before buying, especially if the truck has non-stock lighting.
Not always. The chart shows two courtesy light options: 194 for one configuration and 2721 for another, so you should confirm the bulb position and original lamp style.
Yes. The page includes interior and utility bulb positions such as the trunk or cargo area light, dome light, ash tray light, engine compartment light, and courtesy lights, which makes it useful for a full bulb replacement check.