
SEALIGHT H10/9145/9140 LED Fog Light Bulbs, 6000K Xenon W...
$17.09
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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, Roof Marker 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 covers bulb sizes for the 2005 GMC Sierra 2500HD and helps you verify the correct replacement by lighting position. Instead of guessing by bulb shape alone, you can match the bulb to the exact location on the truck, such as headlights, tail lights, marker lights, interior lamps, and cargo-area lighting.
Because trim level, body style, and lighting package can vary by market, some positions may use different bulbs depending on the truck. Use the chart on this page to confirm the bulb size for each light before ordering, especially if your Sierra 2500HD has factory options, specialty cab configurations, or previous lighting repairs.
For the best fitment, compare the bulb already installed in your truck with the listing for that light position before you buy. This is especially important on the 2005 GMC Sierra 2500HD because trim and package differences can affect courtesy lights, dome lights, and exterior lamps. If you are switching from halogen to LED, remember that an LED replacement may fit physically but still need the correct base type and may behave differently in turn signals, marker lights, or daytime running lights. Aftermarket conversions can also change output, beam pattern, or warning behavior, so check compatibility carefully. When possible, remove the old bulb and verify the number printed on the base or glass before purchase to avoid ordering the wrong part.
The high beam headlight bulb size listed for the 2005 GMC Sierra 2500HD is 9005.
The low beam headlight bulb size listed is 9006.
The daytime running light bulb size listed is 4114.
Both the front turn signal and front parking light positions use 4157NA on this page.
The rear turn signal bulb is listed as 3157A, while the brake light and tail light bulbs are listed as 3157R.
The center high mount stop light bulb size listed for this model year is 921.
The back up reverse light bulb size listed is 3157.
The license plate light bulb size listed is 194.
Both the front side marker light and rear side marker light positions use 194NA.
The front fog light bulb listed on this page is 9145 LED.
The map light bulb is listed as 578. The dome light is also listed as 578 for one option, while another dome light option is 211-2.
The glove box light bulb is listed as 194. Courtesy lights may use 194 for one option or 2721 for another option, depending on the specific setup.
The roof marker light bulb size listed is 194.
The trunk or cargo area light bulb size listed is 912.
Because the 2005 GMC Sierra 2500HD can vary by trim, body style, and lighting package, checking the installed bulb helps confirm the exact fit and avoids ordering the wrong replacement.