Chevrolet Silverado Luggage Compartment Bulb Size

Additional Notes

• The two bulb types used across the Chevrolet Silverado luggage compartment specifications are the 921 and the 912, both of which are ANSI-standardized wedge bulbs of the T15 form factor rated at 12 volts.
• The primary distinction between the 921 and 912 is wattage. The 921 operates at 16 watts, while the 912 operates at 12 watts, making them electrically non-equivalent despite sharing the same T15 wedge base and voltage rating.
• The 912 is classified as a variant of the 921, meaning the two bulbs share physical and base compatibility but differ in their power draw, which is a relevant consideration for direct substitution.
• The Chevrolet Silverado (2015-2020) uses the 921 bulb for the luggage compartment across all trims for those model years.
• Model years 1999-2013 use the 912 bulb exclusively for the luggage compartment, with no trim-level distinctions noted for most of that range.
• The 2014 Chevrolet Silverado is the only model year in the specifications where two different bulb sizes apply simultaneously, with the 921 fitted to the 1500 and the 912 fitted to the 2500 and 3500 HD variants.
• For model years 2003-2006, the 912 fitment is noted specifically for the 1500 and 3500 trim levels only, indicating that the 2500 trim for those years carries a separate specification not reflected in this data.
• The T15 wedge base is a push-in connector type that does not use a separate socket locking mechanism, which is a characteristic shared by both the 921 and 912 in these applications.