GMC Sierra Back Up Light Bulb Size

GMC Sierra back up light bulbs utilize 921, 1156, and 3047 bulb sizes, with outer back up light positions requiring 1156 or 921 sizes. The replacement chart covers vehicle production years from 1999 through 2024.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Back Up Light

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

YearsUS TypeEU TypeShop
2023-20241156 (1500 only)P21WCheck Price
921 (3500 HD only)W16WCheck Price
2022921W16WCheck Price
2021921 (With Fleetside)W16WCheck Price
1156 (Without Fleetside)P21WCheck Price
2014-2020921W16WCheck Price
2007-201330473047Check Price
2000-20063157P27/7WCheck Price
19992456 (1500 only)2456Check Price
921 (2500/3500 only)W16WCheck Price

Outer Back Up Light

YearsUS TypeEU TypeShop
20191156 (With Chassis Cab, 3500 HD only)P21WCheck Price
921 (Without Chassis Cab (ZW9), 3500 HD only)W16WCheck Price
2017-20181156 (1500 only)P21WCheck Price
1156 (With Chassis Cab, 3500 HD only)P21WCheck Price
921 (Without Chassis Cab (ZW9), 3500 HD only)W16WCheck Price

Bulb Specifications

Description Type Shop
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.1156Check Price
ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W.P21WCheck Price
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.921Check Price
ANSI standard (US & Canada). Single-filament wedge bulb (T25). 12V, 27W.3047Check Price
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.3157Check Price
ANSI standard (US & Canada). Festoon bulb, specialty application. 12V.2456Check Price

Other Locations

Additional Notes