Chevrolet Corsica Stepwell Bulb Size

The Chevrolet Corsica stepwell light requires a PC74 bulb size for the specific interior lighting application. Data for the bulb specifications covers the range from 1995 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	US Type	EU Type	Shop
1995-1996	PC74	T5+PCB	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

Other Locations

Additional Notes

The PC74 is the sole bulb type listed for the Chevrolet Corsica stepwell position, appearing across both documented model years, 1995-1996.
The PC74 follows the ANSI standard applicable in the United States and Canada, classifying it as a regionally standardized component rather than a globally universal one.
Physically, the PC74 is a T5 miniature wedge bulb, a form factor defined by a 5/8-inch tubular glass envelope and a wedge-style base that seats directly into a compatible socket without a separate metal cap.
The PC74 uses a printed circuit board twist-lock socket, a mounting type distinct from standard wedge or bayonet sockets and not interchangeable with them without a compatible housing.
At 12V and 1.4W, the PC74 operates at a very low wattage, consistent with indicator and courtesy lighting applications rather than primary illumination.
The twist-lock retention method requires rotational engagement to secure the bulb, meaning a straight pull without rotation will not release it from its socket.