Chevrolet Colorado Luggage Compartment Bulb Size

The Chevrolet Colorado luggage compartment utilizes 912 and 921 bulb sizes for the internal lighting components. Available data covers the production span from 2004 through 2020 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
2015-2020	921
2004-2012	912

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921
ANSI standard (US & Canada). Wedge bulb (T15). Variant of 921. 12V, 12W.	912

Other Locations

Additional Notes

The Chevrolet Colorado luggage compartment uses two bulb types across its model years: the 921 and the 912, both of which are ANSI-standardized wedge bulbs rated at 12 volts and sharing the T15 form factor.
The 921 bulb is rated at 16 watts, while the 912 is rated at 12 watts. Despite their identical T15 wedge base and shared voltage rating, the wattage difference means the two types are not electrically equivalent.
The 912 is classified as a variant of the 921. This relationship indicates a shared physical form but a distinct electrical output, which is a relevant consideration for substitution.
The Chevrolet Colorado (2015-2020) specifies the 921 bulb for the luggage compartment.
The 912 bulb is specified for the Colorado across the 2004-2012 model years.
Both the 921 and 912 carry ANSI standardization applicable to the US and Canadian markets, meaning the specifications conform to a recognized North American industry standard rather than a proprietary or regional-only designation.
The T15 wedge base is a single-contact base type where the bulb is held in place by the tension of the socket rather than a bayonet or screw mechanism, which is a defining physical characteristic of both bulb types listed.