2003 Chevrolet Silverado Replacement Light Bulb Sizes

When you need to replace the headlight, turning signal or parking light bulb on your 2003 Chevrolet Silverado, finding out what the replacement size you need can be a time consuming task. Whether you want to replace your headlamp bulb with a HID (High Intensity Discharge) Headlight Kit, Xenon Headlamp Kit or replace your interior lighting bulbs with LED (Light Emitting Diode) bulbs, we’re here to help you with your 2003 Chevrolet Silverado.

The Modified Life staff has taken all its Chevrolet Silverado headlight bulb replacement guide, Chevrolet Silverado light bulb size guides, Chevrolet Silverado light bulb replacement guides and cataloged them online for use by our visitors for free. Our Chevrolet Silverado light bulb guides allow you to easily replace light bulbs, replace headlight bulb, change a broken lightbulb, install a hid headlight conversion or install led light bulbs instead of spending countless hours trying to figure out which light bulb sizes in your 2003 Chevrolet Silverado.

Feel free to use any replacement light bulb sizes that are listed on Modified Life but keep in mind that all information here is provided as is without any warranty of any kind. Use of the replacement bulb size information is at your own risk. Always verify all light bulb sizes, bulb voltage usage and bulb wattage before applying any information found here to your 2003 Chevrolet Silverado.

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If you can’t find a particular replacement light bulb size guide on Modified Life, please feel free to post a light bulb size guide request at the bottom of this page and we’ll do our best to find you the light bulb size or light bulb replacement information you need for your vehicle.

Adding More Information

If you would like to help the Modified Life community by adding any missing information or adding a new light bulb size information to our resource, please feel free to post it at the bottom of this page.

2003 Chevrolet Silverado Replacement Light Bulb Sizes

Low Beam Headlamp Light Bulb Size: 9006 or 9006 HID Upgrade Kit
High Beam Headlight Bulb Size: 9005 or 9005 HID Upgrade Kit
Parking Light Bulb Size: 3157NALL
Front Turn Signal Light Bulb Size: 3157NALL
Rear Turn Signal Light Bulb Size: 3157LL
Tail Light Bulb Size: 3157LL
Stop Light Bulb Size: 3157LL
High Mount Stop Light Bulb Size: 921
Fog/Driving Light Bulb Size: 9145
License Plate Light Bulb Size: 194
Back Up Light Bulb Size: 3157LL
Front Sidemarker Light Bulb Size: 194
Rear Side Marker Light Bulb Size: 194
Ash Tray Light Bulb Size: 161
Glove Box Light Bulb Size: 194
Map Light Bulb Size: 168 578
Dome Light Bulb Size: 211-2 or 578
Step/Courtesy Light Bulb Size: 194 or 74
Trunk/Cargo Area Light Bulb Size: 912
Under Hood Light Bulb Size: 93
Daytime Running Light Bulb Size: 4114LL


  1. John Terrell Reply

    Can the bulbs in the 2003 Chevrolet Silverado ac/heater control slider switch be replaced? if so, anyone know how?

  2. Kevin Kulley Reply

    Looking for the 2003 chevrolet silverado light bulb in ac/heater temperature control (slider type). the right side light bulb is out. anyone?

  3. ModifiedLife Reply

    Stephen, as much as we would like to help you, most of the light bulb replacement information listed on our website is provided by our visitors. We currently do not have information on how to replace the taillights on your 2003 Chevrolet 2500HD but hopefully someone from our Modified Life community would be able to chime in and help you out.

  4. Just to make sure size 37mm is used for dome and map lights on 03 silverado?

  5. ModifiedLife Reply

    Luis, if you look closely at the clear lens portion of the dome and map light, most late models cars have a small notch where you can insert a flat head screwdriver to pry open the clear lens out of the light housing. Some do not have a notch but the lens can be pried open. Just take your time so you do not crack the lens. Hope this helps. Good luck with your map light bulb replacement.

  6. how do i replace my map light bulb? i want to put leds but havent figured out how to take the old ones out to replace them.

  7. i need to know how to replace the “puddle” lights (under the mirrors) on this 03 silverado

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