Chevrolet Cruze Courtesy Bulb Size

The Chevrolet Cruze courtesy light utilizes a 12961 bulb size for interior illumination within the cabin area. Data for the specific component 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
2017-2018	12961 (Trunk Light)
2011-2016	12961

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961

Other Locations

Additional Notes

The 12961 is the sole bulb type listed across all courtesy light positions for the Chevrolet Cruze in these specifications, covering model years 2011-2018.
The 12961 is a Philips part number designating a miniature wedge bulb built on the T10 form factor with a W2.1x9.5d base.
The W2.1x9.5d base is a standardized wedge-type base, meaning the bulb is held in its socket by the tension of the base itself rather than by a bayonet or screw mechanism.
The 12961 operates at 12 volts and 5 watts, which is consistent with low-current interior lighting applications such as trunk and courtesy illumination.
For the 2017-2018 Cruze, the specifications explicitly label the 12961 application as a Trunk Light, placing the bulb in a defined interior cargo area position.
The T10 designation refers to the bulb's tubular envelope, with the numeral indicating a width of 10 eighths of an inch, a sizing convention common in miniature automotive bulbs.
Because the W2.1x9.5d base is a widely adopted standard, multiple manufacturers produce bulbs that share this base type, though fitment compatibility depends on the rated voltage and wattage matching the socket's design requirements.
Substituting a bulb with a wattage higher than 5W in a socket rated for the 12961 risks exceeding the thermal tolerance of the socket housing and associated wiring.