Buick Terraza Map Light Bulb Size

The Buick Terraza map light requires a bulb size of 192 for the interior lighting system. Data for the specified component covers the range from 2005 to 2007.

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
2005-2007	192

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3W.	192

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Additional Notes

The Buick Terraza uses the 192 bulb for the map light across the 2005-2007 model years.
The 192 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized North American standard shared across the United States and Canada.
The 192 bulb follows the T10 miniature wedge form factor, which refers to a small wedge-shaped base that connects directly into a socket without a separate metal cap or pins.
The 192 bulb operates at 12 volts and draws 3 watts, placing it among the lower-wattage miniature bulbs used in interior vehicle lighting applications.
The wedge base design of the T10 means the bulb is held in place by the tension of the socket itself rather than by a bayonet or screw mechanism, which is a common trait in low-current interior lighting positions.
Because the 192 designation is ANSI-standardized, bulbs carrying that designation from different manufacturers are expected to share the same electrical and physical specifications, supporting interchangeability within that standard.