Chevrolet Trax Back Up Light Bulb Size

Additional Notes

• The 921 is the sole back up light bulb size listed for the Chevrolet Trax across all model years in the specifications, covering 2015-2021 and 2024.
• The 921 bulb follows the ANSI standard recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical parameters shared across those markets.
• It is a wedge-type bulb, classified under the T15 designation. The T15 designation refers to the bulb's tubular shape with a width of 15 eighths of an inch, and the wedge base means it is held in place by the socket gripping the glass envelope directly rather than by a separate metal base with pins.
• The 921 operates at 12 volts, which is consistent with standard automotive electrical systems.
• Its rated wattage is 16W, placing it in the range typical for reverse lighting applications where moderate output is required.
• Because the 921 uses a wedge base, it is not interchangeable with bayonet-base or pin-base bulb types even if those alternatives share a similar voltage or wattage rating.
• The T15 wedge form factor is a common platform for aftermarket LED replacements, though any substitute must match the 12V system requirement and fit the original wedge socket to maintain proper fitment.