GMC W7500 Forward High Beam Indicator Bulb Size

The GMC W7500 Forward high beam indicator utilizes unique bulb sizes 158, 168, 194, and 1445 for the specified lighting component. Available data for the mentioned vehicle covers the range from 1984 through 1996.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

YearsBulb Size
1996158 (Tiltmaster)
1993-1995168 (Tiltmaster)
1992158 (Tiltmaster)
1990-1991168 (Tiltmaster)
1989158 (Tiltmaster)
1988168
1445 (Medium Duty, With 4 Rectangular Headlights)
1987168
19861445
168
158 (Tiltmaster)
1985158
168
194 (Medium Duty)
1984168
1445 (Medium Duty, With 4 Rectangular Headlights)
158 (Tiltmaster)

Bulb Specifications

Description Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3W.158
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.168
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 2W.1445
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.194

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