Chevrolet Corsica Parking Brake Indicator Bulb Size

The Chevrolet Corsica parking brake indicator utilizes bulb sizes PC74, PC37, and 74 depending on the specific version of the component. Data for the listed items covers the range from 1987 to 1996.

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
1994-1996	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 Chevrolet Corsica parking brake indicator bulb specifications span the full production run of the model, covering 1987-1996, and reference three distinct bulb types across that period: the 74, PC37, and PC74.
All three bulb types conform to ANSI standards applicable in both the United States and Canada, and all are classified as miniature wedge bulbs in the T5 envelope size, operating on a 12-volt electrical system.
The 74 bulb is the base type among the three, rated at 12V and 1.4W, and it uses a standard miniature wedge base without a printed circuit board interface. It is specified for the Chevrolet Corsica across the 1987-1990 model years.
The PC37 and PC74 types are printed circuit board variants, meaning they incorporate a twist-lock socket designed to interface directly with instrument cluster printed circuit boards rather than conventional bulb sockets.
The PC74 shares the 12V, 1.4W rating of the base 74 bulb, while the PC37 carries only a 12V rating in these specifications, with no wattage value listed for that type.
The PC37 is specified for the 1991-1993 Corsica, representing a transitional fitment between the earlier 74 and the later PC74 types, all within the same T5 envelope form factor.
The PC74 is specified for the 1994-1996 Corsica and, like the PC37, uses the printed circuit board twist-lock socket, making it incompatible with conventional bulb holders designed for the base 74 type.
Although the 74 and PC74 share identical voltage and wattage ratings, their socket interfaces differ fundamentally. The PC74 requires a printed circuit board twist-lock mount, while the 74 uses a standard wedge socket, meaning the two are not interchangeable despite matching electrical characteristics.
The PC37 and PC74 both use the printed circuit board twist-lock socket format, but they are distinct part numbers and are not listed as interchangeable within these specifications.
The shift from the 74 to the PC-series bulb types in the Corsica's instrument cluster reflects the broader industry transition toward printed circuit board instrument panels, which consolidate wiring and eliminate individual bulb holders in favor of direct board-mounted sockets.