Chevrolet Corvette Map Light Bulb Size

The Chevrolet Corvette map light utilizes unique bulb sizes 212-2, 168, 74, 214-2, and 90 depending on the specific production version of the vehicle. Available data covers the range from 1962 through 2013.

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
1997-2013	212-2
1994-1996	168
1993	74
1989-1992	168
1987-1988	74
1984	214-2
1977-1982	214-2
1966-1971	168
1962-1965	90

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	212-2
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 1.4W.	74
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	214-2
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 13W.	90

Other Locations

Additional Notes

The Chevrolet Corvette map light specifications cover four distinct bulb types across the model's history: the 212-2, 214-2, 168, 74, and 90.
The 212-2 is a festoon-style bulb with an SV8.5 base, a 41mm length, and a 12V, 12W rating. It is the bulb specified for the Chevrolet Corvette map light across the 1997-2013 model years, making it the most frequently appearing bulb type in these specifications.
The 214-2 shares the same festoon form factor, SV8.5 base, 41mm length, and 12V, 12W electrical rating as the 212-2. It is specified for the 1977-1984 model years. Despite their identical physical and electrical characteristics, the two part numbers are not confirmed as interchangeable within these specifications.
The 168 is a T10 miniature wedge bulb rated at 12V and 4.9W. Its wedge base design requires no separate socket retention mechanism, as the bulb body itself locks into the housing. It is specified for map light use across multiple non-consecutive year groups.
The 74 is a T5 miniature wedge bulb, smaller than the T10 168, and is rated at a notably lower 12V, 1.4W. It is specified for the 1987-1988 and 1993 model years.
The 90 is a single-filament bulb with a BA15s bayonet base, rated at 12V and 13W. The bayonet base uses a push-and-twist installation method. It is specified for the 1962-1965 Corvette map light position.
The T5 (74) and T10 (168) wedge bulbs are physically incompatible with each other due to differing base widths, and neither is interchangeable with the festoon-type 212-2 or 214-2 bulbs, which require a dedicated festoon socket.
The 90's BA15s bayonet base is mechanically distinct from all other base types present in these specifications, meaning it is not interchangeable with any wedge or festoon bulb listed.
All bulb types listed across these specifications conform to ANSI standards applicable in both the United States and Canada, indicating consistent regulatory compliance across the full range of model years covered.
The wattage values across the listed bulbs range from 1.4W for the 74 to 13W for the 90, reflecting significant variation in light output and electrical draw depending on the model year.