GMC Sierra Ash Tray Bulb Size

GMC Sierra ash tray bulb utilizes a 161 size for this component. The replacement chart covers vehicle production spanning 1999 to 2006.

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 Type	Shop
1999-2006	161	Check Price

Description	Type	Shop
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 1W.	161	Check Price

The GMC Sierra uses the 161 bulb for the ash tray across the 1999-2006 model years.
The 161 is classified as a miniature wedge bulb, using a T10 base, which is a small plastic wedge-style fitting that connects directly into a socket without a separate metal base or locking mechanism.
The bulb operates at 12 volts, consistent with standard automotive electrical systems.
At 1 watt, the 161 produces a low output suited to interior illumination tasks such as ash tray lighting rather than exterior or safety-critical applications.
The 161 carries ANSI standardization, meaning its physical and electrical characteristics are defined by a recognized industry specification applicable in both the United States and Canada.
Because the T10 wedge base is a widely shared form factor, bulbs from other ANSI designations using the same base type may physically fit the socket, though voltage and wattage ratings must match the 12V, 1W specification to avoid electrical incompatibility.