Chevrolet City Express Courtesy Bulb Size

The Chevrolet City Express courtesy light requires a 12961 bulb size for proper installation and function within the interior lighting system. Data for 12961 bulbs covers the 2015 to 2016 range for the specified vehicle.

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
2015-2016	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 a Philips part number designating a miniature wedge bulb in the T10 form factor, which uses a W2.1x9.5d base. This base type is a wedge-style connection, meaning the bulb is held in place by tension rather than a bayonet or screw mechanism.
The 12961 operates at 12 volts and 5 watts, placing it in the low-wattage range typical of interior courtesy lighting applications.
The T10 designation refers to the bulb's tubular envelope, with the number indicating a width of 10 eighths of an inch. This is a widely used form factor across many vehicle interior lighting positions.
The Chevrolet City Express uses the 12961 bulb for courtesy lighting across both the 2015-2016 model years, representing the full production span covered by these specifications.
The W2.1x9.5d base standard is defined by IEC specifications, where 2.1 refers to the pin width in millimeters and 9.5 refers to the wedge length in millimeters. Substituting a bulb with a different base designation risks an improper fit within the socket.