Chevrolet Celebrity Automatic Transmission Indicator Bulb Size

The Chevrolet Celebrity automatic transmission indicator utilizes bulb sizes 161, 168, and 194 depending on the specific version of the component installed in the vehicle. Data for the lighting components covers the range from 1982 through 1988 without providing information for any other periods.

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
1987-1988	168
1985-1986	194
1984	168
1983	161
1982	194

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, 3.78W.	194
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 1W.	161

Other Locations

Additional Notes

The Chevrolet Celebrity automatic transmission indicator uses three distinct bulb sizes across its 1982-1988 model years: 168, 194, and 161.
All three bulb types used in the Celebrity's transmission indicator are ANSI-standardized miniature wedge bulbs of the T10 form factor, operating at 12 volts.
The T10 wedge form factor is a small, wedge-shaped base design that seats without a separate socket locking mechanism, relying on the wedge shape itself to maintain contact.
Although the 168, 194, and 161 bulbs share the same T10 wedge base and 12V rating, they differ in wattage: 4.9W, 3.78W, and 1W respectively, which means they are not electrically interchangeable despite fitting the same socket physically.
The Chevrolet Celebrity (1987-1988) uses the 168 bulb, rated at 4.9W, the highest wattage among the three types specified.
The 194 bulb, rated at 3.78W, appears in the 1982, 1985, and 1986 model years, making it the most frequently specified type across the Celebrity's production run for this application.
The 161 bulb, rated at 1W, is specified exclusively for the 1983 model year, representing the lowest wattage of the three types used.
The 1984 model year returns to the 168 bulb after the 194 was used in 1982 and 1983 used the 161, reflecting non-uniform bulb selection across consecutive years.
Substituting a higher-wattage bulb such as the 168 in place of the 161 in a 1983 Celebrity could place unintended electrical load on the indicator circuit, as the wattage difference between them is nearly fivefold.