2003 Chevrolet Avalanche Headlight Bulbs & Lighting Guide
Choose the factory headlight system below to see the correct bulb and recommendation path for this 2003 Chevrolet Avalanche.
Low beam
Factory halogen system
High beam
9005 / HB3
Factory setup
Lighting: halogen
Choose the factory system installed in this vehicle. Bulb sizes and recommendations change with that selection.
Best headlight upgrades
These products were physically tested by BulbFacts, but the tests were not performed in this exact vehicle unless a card explicitly says otherwise.
Lighting: halogen
High Beam: 9005 / HB3
Best direct replacement
OSRAM Night Breaker 200
High Beam 9005 / HB3
BulbFacts testedCorrect bulb size
Best Standard Reflector Upgrade
The Night Breaker 200 is the top standard-wattage reflector recommendation at the time of review. Anything scoring higher in the reflector chart uses much higher wattage, while the NB200 keeps the simple drop-in halogen format.
A matching bulb size identifies fitment; it does not by itself prove optical compatibility or make a conversion a vehicle-specific recommendation.
Support independent testing: BulbFacts may earn a commission from qualifying purchases through these links, at no extra cost to you. Affiliate relationships do not determine test results or recommendations.
Best headlight upgrades
BulbFacts has a supported bulb-size record, but does not currently have enough applicable product evidence to show a responsible recommendation for this headlight system.
Lighting: halogen / halogen infrared
High Beam: 9011
Fitment confirmed; product evidence is limited. Choose or verify the installed factory headlight system before using a bulb size or product recommendation.
Best headlight upgrades
These products were physically tested by BulbFacts, but the tests were not performed in this exact vehicle unless a card explicitly says otherwise.
Model: 1500
Low Beam: 9006 / HB4
Best direct replacement
OSRAM Night Breaker 200
Low Beam 9006 / HB4
BulbFacts testedCorrect bulb size
Best Standard Reflector Upgrade
The Night Breaker 200 is the top standard-wattage reflector recommendation at the time of review. Anything scoring higher in the reflector chart uses much higher wattage, while the NB200 keeps the simple drop-in halogen format.
A matching bulb size identifies fitment; it does not by itself prove optical compatibility or make a conversion a vehicle-specific recommendation.
Support independent testing: BulbFacts may earn a commission from qualifying purchases through these links, at no extra cost to you. Affiliate relationships do not determine test results or recommendations.
Best headlight upgrades
These products were physically tested by BulbFacts, but the tests were not performed in this exact vehicle unless a card explicitly says otherwise.
Model: 2500
Low Beam: 9006 / HB4
Best direct replacement
OSRAM Night Breaker 200
Low Beam 9006 / HB4
BulbFacts testedCorrect bulb size
Best Standard Reflector Upgrade
The Night Breaker 200 is the top standard-wattage reflector recommendation at the time of review. Anything scoring higher in the reflector chart uses much higher wattage, while the NB200 keeps the simple drop-in halogen format.
A matching bulb size identifies fitment; it does not by itself prove optical compatibility or make a conversion a vehicle-specific recommendation.
Support independent testing: BulbFacts may earn a commission from qualifying purchases through these links, at no extra cost to you. Affiliate relationships do not determine test results or recommendations.
Other bulbs
Available exterior and interior lighting data for this model year.
Fog Light
9145Likely fitment
Fog Light
881Likely fitment
Brake Light
3157Likely fitment
Cargo / Trunk Light
211-2Likely fitment
Courtesy Light
T5Likely fitment
Dome Light
211-2Likely fitment
Door Light
T10Likely fitment
Door Mirror Illumination
211-2Likely fitment
Daytime Running Light
3157Likely fitment
Front Side Marker
T10Likely fitment
Front Turn Signal
3157Likely fitment
Glove Box Light
T10Likely fitment
Technical details and sources
Fitment, factory-system research, and BulbFacts product tests remain separate evidence. A matching bulb size does not by itself make a conversion a vehicle-specific recommendation.
Position
Bulb or system
Evidence status
High BeamLighting: halogen
9005 / HB3
Likely fitment
High BeamLighting: halogen / halogen infrared
9011
Likely fitment
Low BeamModel: 1500
9006 / HB4
Likely fitment
Low BeamModel: 2500
9006 / HB4
Likely fitment
Other Chevrolet Avalanche years
Each model year opens its own BulbFacts record. Bulb sizes and factory systems are not carried over from adjacent years.
Fitment note: Verify the installed bulb, connector, housing, and factory system before ordering. A bulb-size match is not automatically a conversion recommendation or proof of vehicle-specific testing.
