Pontiac Trans Sport Map Light Bulb Size

The Pontiac Trans Sport map light utilizes bulb sizes 168, 906, and 562 depending on the specific vehicle configuration. Available data for the lighting components covers the period from 1990 to 1998.

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
1997-1998	168
1996	906
1994-1995	562
1993	906
1992	562
1990-1991	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
ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W.	562

Other Locations

Additional Notes

The Pontiac Trans Sport map light draws from three distinct bulb types across its 1990-1998 model years: the 168, 906, and 562.
The 906 bulb is a miniature wedge type with a T10 base, rated at 12V and 8W, and follows the ANSI standard applicable in both the US and Canada.
The 168 bulb shares the same T10 miniature wedge base and 12V operating voltage as the 906, but draws less power at 4.9W, making the two bulbs physically similar yet electrically distinct.
The 562 bulb differs fundamentally in construction from the 168 and 906, as it is a festoon type with end-cap contacts rather than a wedge base, measuring 44mm in length and rated at 12V and 12W.
Because the 168 and 906 share a T10 wedge base, physical fitment between the two is possible, but their wattage difference means one is not a direct electrical substitute for the other in applications where the original specification must be met.
The 562 festoon bulb is not interchangeable with either the 168 or the 906, as its end-cap contact design and socket type are incompatible with a wedge-base housing.
The Pontiac Trans Sport used the 906 bulb for its map light in the 1990-1991 and 1993 model years, as well as in 1996.
The 562 festoon bulb was specified for the 1992, 1994, and 1995 model years.
The 168 wedge bulb was specified for the 1997-1998 model years.
All three bulb types conform to ANSI standards recognized in both the US and Canada, indicating standardized production tolerances across the bulb series.