Chevrolet Lumina Map Light Bulb Size

Additional Notes

• The Chevrolet Lumina map light draws from three distinct bulb types across its 1990-2001 model years: the 212-2, the 192, and the 561.
• The 212-2 and 561 are both festoon-style bulbs rated at 12V and 12W, meaning they share identical voltage and wattage but differ in physical form.
• The 212-2 festoon bulb measures 41mm in length and uses an SV8.5 base, which features two metal pins on a cylindrical collar rather than end-cap contacts.
• The 561 festoon bulb measures 44mm in length and uses end-cap contacts, making it physically incompatible with the 212-2 socket despite the two bulbs sharing the same wattage rating.
• The Chevrolet Lumina (1997-2001) uses the 212-2 bulb for the map light, representing the longest continuous fitment of a single bulb type across this model's production span covered in these specifications.
• The 192 is a T10 miniature wedge bulb rated at 12V and 3W, a significantly lower wattage than the festoon types used in other model years, reflecting a different socket and mounting design entirely.
• The wedge base of the 192 bulb is not interchangeable with either festoon type, as wedge bulbs are held in place by socket tension rather than end-cap or pin-collar contacts.
• All three bulb types conform to ANSI standards applicable in both the United States and Canada, indicating standardized electrical and dimensional tolerances within those markets.
• The 1993-1996 Lumina uses the 192 wedge bulb, which at 3W draws considerably less power than the 12W festoon bulbs specified for surrounding model years.
• Because the 212-2 and 561 differ in both length and contact type, substituting one for the other in the Lumina map light socket would result in an incorrect fit regardless of their matching wattage.