Factory headlight setup not identified

1991 Chevrolet Blazer Headlight Bulbs & Lighting Guide

Factory bulb sizes and relevant BulbFacts-tested replacement evidence for the 1991 Chevrolet Blazer.

Source-listed fitment data supplied by CarBulbGuide. Confirm the installed bulbs and configuration before ordering.

Low beam
H4703
High beam
H4701
Factory setup
Factory headlight setup not identified
Representative SUV or crossover image for 1991 Chevrolet Blazer
Representative SUV or crossover image

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.

Factory headlight setup not identified

Low Beam: H4703 · High Beam: H4701 · High/Low Beam Combined: H6054

Fitment confirmed; product evidence is limited. Choose or verify the installed factory headlight system before using a bulb size or product recommendation.

Other bulbs

Available exterior and interior lighting data for this model year.

Ashtray Light
194Verify installed bulb
Check Engine Indicator
194Verify installed bulb
Dome Light
211-2Verify installed bulb
Engine Compartment Light
93Verify installed bulb
Front Side Marker
168Verify installed bulb
Glove Box Light
194Verify installed bulb
High Beam Indicator
168Verify installed bulb
License Plate Light
67Verify installed bulb
Map Light
906Verify installed bulb
Radio Display Light
1893Verify installed bulb
Rear Side Marker
194Verify installed bulb
Rear Turn Signal
2057Verify installed bulb
Reverse Light
1156Verify installed bulb
Technical details and sources

Confirm the installed bulb, connector, housing, and factory system before ordering.

PositionBulb or systemFitment status
Low BeamFactory system not specifiedH4703Bulb size confirmed
High BeamFactory system not specifiedH4701Bulb size confirmed
High/Low Beam CombinedFactory system not specifiedH6054Bulb size confirmed

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.