GMC Safari Map Light Bulb Size

The GMC Safari map light utilizes bulb sizes 168 and 906 for the interior illumination system. Available data covers the span of production from 1985 through 2005.

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
1996-2005	168
1985-1995	906

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 8W.	906

Other Locations

Additional Notes

The GMC Safari map light uses one of two bulb sizes across its model years: the 168 for 1996-2005 and the 906 for 1985-1995.
Both the 168 and the 906 are ANSI-standardized miniature wedge bulbs of the T10 type, operating at 12 volts.
Although both bulbs share the same T10 wedge base and voltage rating, they are not interchangeable due to differing wattage ratings.
The 168 bulb is rated at 4.9 watts, while the 906 bulb draws 8 watts, meaning the 906 produces more light output but also generates more heat and draws more current.
Substituting a higher-wattage 906 into a socket designed for the 4.9-watt 168 risks exceeding the thermal and electrical tolerances of the fixture.
The T10 designation refers to the wedge base form factor, which is a common miniature bulb format used in low-current interior lighting applications such as map lights.
ANSI standardization for both bulbs means the specifications are consistent across manufacturers producing these part numbers in the United States and Canada.