Chevrolet Beretta Automatic Transmission Indicator Bulb Size

The Chevrolet Beretta automatic transmission indicator utilizes a single 74 bulb size for illumination purposes. Data for the specified component covers the period from 1987 through 1994.

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
1987-1994	74

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 1.4W.	74

Other Locations

Additional Notes

The 74 bulb is the sole automatic transmission indicator bulb type listed across all model years of the Chevrolet Beretta covered by these specifications, spanning 1987-1994.
The 74 bulb is classified as an ANSI standard type, meaning it conforms to a standardized designation recognized across the United States and Canada.
It is a T5 miniature wedge bulb, where T5 refers to a tubular glass envelope approximately 5/8 inch wide, and the wedge base type means the bulb is held in its socket by the glass envelope itself rather than a separate metal base.
The 74 bulb operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles of this era.
At a rated output of 1.4 watts, the 74 bulb draws very low current, which is typical for instrument panel indicator lighting where brightness requirements are minimal.
The wedge base format of the 74 bulb is not interchangeable with bayonet or screw-base socket types, as each base design requires a physically distinct socket configuration.