Choose the factory headlight system below to see the correct bulb and recommendation path for this 2021 GMC Yukon.
Low beam
H11
High beam
Factory halogen system
Factory setup
Factory setup not specified in fitment source
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.
Factory setup not specified in fitment source
Low Beam: H11
Best direct replacement
OSRAM Night Breaker 200
Low Beam H11
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.
Trim: XL
Low Beam: H11
Best direct replacement
OSRAM Night Breaker 200
Low Beam H11
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.
License Plate Light
T10Possible fitment — verify installed bulb
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
Low BeamFactory setup not specified in fitment source
H11
Possible fitment — verify installed bulb
Low BeamTrim: XL
H11
Likely fitment
Other GMC Yukon 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.
