Chevrolet Beretta Turn Signal Indicator Bulb Size

The Chevrolet Beretta turn signal indicator utilizes bulb sizes PC74, PC37, and 74 depending on the specific version of the vehicle. Data for the bulb sizes covers the range 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
1994	PC74
1991-1993	PC37
1987-1990	74

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T5) with printed circuit board twist-lock socket, for instrument clusters. 12V, 1.4W.	PC74
ANSI standard (US & Canada). Miniature wedge bulb (T5) with printed circuit board twist-lock socket, for instrument clusters. 12V.	PC37
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 1.4W.	74

Other Locations

Additional Notes

The turn signal indicator bulb specifications for the Chevrolet Beretta span the 1987-1994 model years and reference three distinct bulb types: the 74, the PC37, and the PC74.
The 74 bulb is an ANSI-standard miniature wedge type in the T5 form factor, rated at 12V and 1.4W. It is specified for the Beretta across the 1987-1990 model years.
The PC37 and PC74 are printed circuit board twist-lock variants of the same T5 miniature wedge form factor. This socket type is designed specifically for instrument cluster panels that use a printed circuit board rather than conventional wiring harnesses.
The PC37 is specified for the 1991-1993 Beretta. Unlike the 74 and PC74, no wattage rating is listed for the PC37 in these specifications.
The PC74 is specified exclusively for the 1994 Beretta (Chevrolet Beretta) and shares the 12V, 1.4W electrical rating of the standard 74 bulb, while adding the printed circuit board twist-lock socket interface.
Although the 74 and PC74 share identical voltage and wattage ratings, their socket types differ. The 74 uses a standard wedge base, while the PC74 uses a twist-lock printed circuit board socket, making the two types non-interchangeable despite their electrical equivalence.
The transition from the standard 74 bulb to the PC-series variants beginning with the 1991 model year reflects a change in socket interface, with the instrument cluster assembly shifting to a printed circuit board mounting system.
All three bulb types conform to ANSI standards applicable in both the United States and Canada, placing them within a standardized North American automotive lighting classification system.