Chevrolet Captiva Sport Tail Light Bulb Size

Additional Notes

• The Chevrolet Captiva Sport uses two distinct tail light bulb sizes across its model years, with the 7443 fitted in 2013-2015 models and the 3157 fitted in the 2012 model.
• The 7443 is a dual-filament wedge bulb classified under the T20 body type, operating at 12 volts with a wattage rating of 21W on the high filament and 5W on the low filament.
• The 3157 is a dual-filament wedge bulb classified under the T25 body type, operating at 12 volts with a wattage rating of 27W on the high filament and 7W on the low filament.
• Both the 7443 and 3157 conform to ANSI standards applicable in the United States and Canada, meaning they follow a standardized specification for base design, voltage, and filament configuration.
• The dual-filament design in both bulb types allows a single bulb to serve two lighting functions simultaneously, typically combining stop light and tail light operation within one housing.
• The T20 and T25 designations refer to the wedge base size of each bulb, with T25 being physically larger than T20. This size difference makes the 7443 and 3157 non-interchangeable despite their similar dual-filament function.
• The higher wattage of the 3157 relative to the 7443 means the 2012 Captiva Sport tail light produces greater luminous output on both filaments than the configuration used in 2013-2015 models.
• Because the 7443 and 3157 differ in both base size and wattage, substituting one for the other in the Captiva Sport is not a compatible replacement across the 2012 and 2013-2015 model years.