Chevrolet Beretta High Beam Indicator Bulb Size

Additional Notes

• The three bulb types specified for the Chevrolet Beretta high beam indicator across its production years are the PC74, PC37, and 74, all of which conform to ANSI standards applicable in the United States and Canada.
• All three bulb types share the T5 miniature wedge form factor and operate on a 12V electrical system, establishing a common physical and electrical baseline across the model's production span.
• The PC74 and 74 bulbs are both rated at 1.4W, while the PC37 specification carries no wattage rating in the provided data.
• The PC74 and PC37 types feature a printed circuit board twist-lock socket designed for instrument cluster applications, distinguishing them from the standard 74 bulb, which uses a plain miniature wedge base without a twist-lock mechanism.
• The socket type difference between the PC-series bulbs and the standard 74 bulb represents a fitment incompatibility; the twist-lock printed circuit board socket of the PC74 and PC37 is not interchangeable with the conventional wedge socket used by the 74 bulb.
• The Chevrolet Beretta (1987-1990) used the standard 74 bulb for the high beam indicator, after which the specification shifted to PC-series bulbs in subsequent model years.
• The 1991 and 1994 model years share the PC74 specification, while 1992-1993 used the PC37, indicating that two distinct printed circuit board bulb types were used within the PC-series period of the vehicle's production.
• Although the PC74 and PC37 share the same socket type and T5 form factor, they are not confirmed as interchangeable due to the absence of a wattage rating for the PC37 and the distinct ANSI designations assigned to each type.