Chevrolet Classic Sun Visor Bulb Size

The Chevrolet Classic sun visor requires a bulb with the unique size 37 for the interior lighting component. Data for the specific bulb requirements covers the range from 2004 to 2005.

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
2004-2005	37

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 1W.	37

Other Locations

Additional Notes

The T5 miniature wedge is the bulb type specified for the sun visor position in the Chevrolet Classic across both listed model years, 2004-2005.
The T5 designation refers to a tubular bulb with a body width of 5/8 inch, a form factor widely used in low-intensity interior lighting applications such as sun visors and instrument panels.
The wedge base design means the bulb is held in its socket by the tension of the base contacts alone, without a separate locking mechanism or bayonet pins.
The bulb operates at 12 volts and draws 1 watt, placing it among the lowest-wattage bulbs found in automotive interior applications.
The ANSI trade number 37 is standardized across the United States and Canada, meaning bulbs carrying this designation from different manufacturers share the same electrical and physical characteristics.
Because the T5 wedge base is a common form factor shared by several ANSI trade numbers, substitution with a visually similar bulb of a different trade number risks an incorrect fit or wattage mismatch.