Chevrolet Cruze Back Up Light Bulb Size

The Chevrolet Cruze back up light requires a 921 bulb size for proper installation and function within the rear lighting assembly. Provided data covers the range from 2011 to 2018.

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
2011-2018	921

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921

Other Locations

Additional Notes

The Chevrolet Cruze uses the 921 bulb size for the back up light across the 2011-2018 model years.
The 921 is a wedge-type bulb, classified under the T15 designation, which refers to its tubular glass envelope size measured in eighths of an inch.
Wedge bulbs are named for their wedge-shaped base, which holds the bulb in place through friction rather than a separate metal socket or bayonet fitting.
The 921 operates at 12 volts and draws 16 watts, which is consistent with standard automotive electrical systems.
The 921 follows the ANSI standard, meaning it conforms to specifications recognized across the United States and Canada, supporting broad availability and cross-brand interchangeability within that standard.
Because the 921 is an ANSI-standardized wedge bulb, it is physically and electrically interchangeable with other bulbs sharing the same T15 wedge base and 12V/16W ratings, provided the replacement meets those same parameters.