Fitment Guaranteed for 2003 Gmc Sierra Denali

2003 Gmc Sierra Denali Bulb Sizes

Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.

Installation Difficulty

Easy (Plug and Play)

Est. Replacement Cost

$15 - $40 (Halogen) / $30+ (LED)

Full Bulb Size Chart

PositionBulb SizeShop
Low Beam
9005 LEDCheck Price on Amazon
High Beam
9005 LEDCheck Price on Amazon
Fog Light
880 LEDCheck Price on Amazon
Brake Light
921 LEDCheck Price on Amazon
Side Marker
194 LEDCheck Price on Amazon
Turn Signal Front
3157AK LEDCheck Price on Amazon
Turn Signal Rear
3157K LEDCheck Price on Amazon
Reverse Light
3157KCheck Price on Amazon
Dome Light
211-2 or 578Check Price on Amazon
License Plate
194Check Price on Amazon
Map Light
578 or 168Check Price on Amazon
Parking Light
3157AKCheck Price on Amazon
Trunk Light
912Check Price on Amazon

Installation Guide

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Video suggestion: Installation GuideBy YouTube

Frequently Asked Questions

The 2003 GMC Sierra Denali uses a 9005 LED bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

The high beam bulb size for the 2003 GMC Sierra Denali is 9005 LED.

The 2003 GMC Sierra Denali uses a single bulb (dual filament) headlight system. This means one bulb controls both high and low beams.

Yes, the 2003 GMC Sierra Denali comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a 9005 LED LED conversion kit for the low beams.

Yes, the 2003 GMC Sierra Denali takes a 880 LED bulb for the fog light position.

Other Sierra Denali Years

201120102009200820072006200520042002

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Disclaimer

Bulb sizes can vary by trim level. Always check your owner's manual or remove the existing bulb to verify the size before purchasing. We may earn a commission from links on this page.