When doing replacement or upgrading on 1985 – 1988 GMC Brigadier with 2 4 headlamps, the bulb size guide is necessary for you to take the reference. Jump to a corresponding car model with the catalog below.

• GMC Brigadier with 4 headlamps Bulb Size Guide
• GMC Brigadier with 2 headlamps Bulb Size Guide

1985 – 1988 GMC Brigadier with 4 headlamps Bulb Size Guide
Low Beam Headlight	1988	H4656
	1985 – 1987	H5006
High Beam Headlight	1988	H4651
	1985 – 1987	H5001
Back Up Light	1985 – 1988	1156
Brake	1985 – 1988	1157
Front Side Marker	1985 – 1988	1157
Front Turn Signal	1985 – 1988	1157
Parking Light	1985 – 1988	1157
Rear Side Marker	1985 – 1988	1157
Rear Turn Signal	1985 – 1988	1157
Tail Light	1985 – 1988	1157

1985 – 1988 GMC Brigadier with 2 headlamps Bulb Size Guide
High Beam and Low Beam Headlight	1985 – 1988	6014
Back Up Light	1985 – 1988	1156
Brake	1985 – 1988	1157
Front Side Marker	1985 – 1988	1157
Front Turn Signal	1985 – 1988	1157
Parking Light	1985 – 1988	1157
Rear Side Marker	1985 – 1988	1157
Rear Turn Signal	1985 – 1988	1157
Tail Light	1985 – 1988	1157