Chevrolet Beretta Seat Belt Warning Bulb Size

The Chevrolet Beretta seat belt warning light utilizes PC74, PC37, and 74 bulb sizes depending on the specific application for the interior dashboard illumination. Available data for the lighting components 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	US Type	EU Type	Shop
1994	PC74	T5+PCB	Check Price
1991-1993	PC37	T5+PCB	Check Price
1987-1990	74	W1.2W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Miniature wedge bulb (T5) with printed circuit board twist-lock socket, for instrument clusters. 12V, 1.4W.	PC74	Check Price
ANSI standard (US & Canada). Miniature wedge bulb (T5) with printed circuit board twist-lock socket, for instrument clusters. 12V.	PC37	Check Price
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 1.4W.	74	Check Price
ECE standard (Europe & worldwide). Miniature wedge bulb (T5) with W2x4.6d base. 12V, 1.2W.	W1.2W	Check Price

Other Locations

Additional Notes

The seat belt warning bulb position in the Chevrolet Beretta uses three distinct bulb types across its production run: the 74, PC37, and PC74, all of which conform to ANSI standards recognized in both the United States and Canada.
All three bulb types share the T5 miniature wedge form factor, which refers to a small wedge-base bulb approximately 5/8 of an inch wide, commonly used in instrument cluster applications.
The 74 bulb is a standard T5 miniature wedge type rated at 12V and 1.4W, and it was the specified fitment for the 1987-1990 model years.
The PC37 and PC74 variants differ from the standard 74 in that both feature a printed circuit board twist-lock socket, a design intended specifically for instrument clusters that use printed circuit board connections rather than conventional wiring harnesses.
The 1991-1993 model years use the PC37, which shares the printed circuit board twist-lock socket with the PC74 but does not carry a published wattage rating in the specifications.
The PC74 was introduced for the 1994 model year and carries the same 12V, 1.4W electrical rating as the standard 74, while retaining the printed circuit board twist-lock socket of the PC-series bulbs.
Despite the physical similarity of the T5 wedge base across all three types, the printed circuit board twist-lock socket on the PC37 and PC74 makes those bulbs non-interchangeable with the standard 74 in applications designed for conventional sockets.