Chevrolet Astro Radio Display Bulb Size

The Chevrolet Astro radio display utilizes a 168 bulb size for illumination purposes within the internal dashboard assembly. Data provided for the specific component covers the period from 1985 through 1991.

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
1985-1991	168

Bulb Specifications

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

Other Locations

Additional Notes

The 168 bulb is the sole radio display bulb type listed across all Chevrolet Astro model years in the specifications, covering 1985-1991.
The 168 bulb follows the ANSI standard recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical criteria shared across North American markets.
It is classified as a T10 miniature wedge bulb, a form factor that uses a tapered plastic base to make direct contact with the socket rather than relying on metal pins or a bayonet fitting.
The bulb operates at 12 volts and draws 4.9 watts, which places it in the low-wattage range typical of instrument and display illumination applications.
The T10 wedge base is a widely produced form factor, and the 168 designation identifies a specific variant within that family, meaning not all T10 bulbs are interchangeable with the 168 even if they share the same base style.
The consistent use of the 168 across the entire 1985-1991 production span of the Chevrolet Astro indicates that the radio display socket specification did not change during that period.