Chevrolet Trailblazer Map Light Bulb Size

Additional Notes

• The 194 bulb is the sole map light bulb size listed across all model years of the Chevrolet Trailblazer covered in these specifications.
• The 194 bulb follows the ANSI standard recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical criteria shared across those markets.
• It is a miniature wedge-type bulb, classified under the T10 designation. The T10 designation refers to a bulb body that is 10 eighths of an inch wide, and the wedge base design relies on the bulb's own glass envelope to make contact with the socket rather than using a separate metal base.
• The 194 bulb operates at 12 volts, which is consistent with standard automotive electrical systems.
• Its rated power draw is 3.78 watts, placing it among the lower-consumption incandescent bulbs used in vehicle interior lighting.
• The Chevrolet Trailblazer (2002-2005) shares the same 194 map light bulb size as the 2021 and 2023-2024 model years, which reflects a consistent socket format across two otherwise distinct vehicle generations.
• Because the T10 wedge format is widely standardized, aftermarket and OEM-equivalent 194 bulbs from different manufacturers are generally interchangeable in the same socket, provided the voltage and wattage ratings are matched.
• Substituting a bulb with a higher wattage than 3.78 watts into a socket rated for the 194 may risk overloading the socket or the associated wiring circuit.