Chevrolet Caprice Check Engine Bulb Size

The Chevrolet Caprice check engine light requires a bulb with the unique size PC161 for the instrument cluster. Data for the specific component covers the range from 1991 to 1992.

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 Type	Shop
1991-1992	PC161	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Miniature wedge bulb (T10) with printed circuit board twist-lock socket, for instrument clusters. 12V.	PC161	Check Price

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Additional Notes

The PC161 is the bulb type specified for the check engine indicator in the Chevrolet Caprice across the 1991-1992 model years.
The PC161 follows the ANSI standard, which is the recognized specification body for miniature automotive bulbs in the United States and Canada.
The PC161 belongs to the T10 wedge bulb family, a miniature form factor widely used in instrument cluster applications.
Unlike a standard wedge base, the PC161 uses a printed circuit board twist-lock socket, which is a fitment type specific to instrument cluster panels that use PCB-based electrical connections.
The twist-lock socket design of the PC161 means it is not directly interchangeable with standard T10 wedge bulbs, despite sharing the same general bulb envelope shape.
The PC161 operates at 12 volts, consistent with the standard electrical system voltage of passenger vehicles of that era.