Chevrolet G-Van Map Light Bulb Size

The Chevrolet G-Van map light requires 2 distinct bulb sizes: 906 and 194, with each size corresponding to specific applications within the vehicle's lighting system. The replacement chart covers data spanning from 1985 to 1995, detailing which bulb size applies across the production years for this model.

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

Years	Bulb Size
1992-1995	906
1988-1991	194
1985-1987	906

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 8W.	906
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194

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Additional Notes

The Chevrolet G-Van map light bulb specifications cover model years 1985 through 1995, with two distinct bulb sizes used across that span: the 906 and the 194.
Both the 906 and 194 are ANSI-standardized miniature wedge bulbs of the T10 type, recognized across the United States and Canada.
Although both bulbs share the T10 wedge form factor and operate on a 12-volt system, they are not interchangeable due to a difference in wattage.
The 906 bulb draws 8 watts, while the 194 draws 3.78 watts, meaning the 906 produces a notably higher light output and generates more heat during operation.
The 906 bulb is specified for the Chevrolet G-Van for model years 1985-1987 and again for 1992-1995.
The 194 bulb is specified for model years 1988-1991.
The T10 wedge base is a common automotive bulb format in which the glass envelope itself serves as the retention mechanism, fitting directly into a wedge-style socket without a separate metal base.
The wattage difference between the two bulbs is relevant to socket compatibility, as sockets and surrounding trim components are rated for specific heat tolerances that correspond to the original bulb's wattage.