Chevrolet Impala Turn Signal Bulb Size

Chevrolet Impala front and rear turn signal bulbs utilize sizes 7444NA, 7443NA, 4157NA, 7443, 3057, and 2057 depending on generation, with the bulb specifications varying across multiple production generations. The replacement chart covers vehicle data spanning 1958 through 2020, detailing bulb sizes for each model year range.

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

Front Turn Signal

YearsBulb Size
2019-20207444NA
2014-20187443NA
2009-20134157NA
20085702AK
20074157NA
20065702AK
2004-20053457NA
20033357NA
2001-20023457NA
20003357NA
1994-19962057NA
1983-19852057NA
19821157NA
1980-19811034NA
19791157NA
19781034NA
19771157NA
19761034NA
19751157NA
19741034NA
1964-19731157
1958-19631034

Rear Turn Signal

YearsBulb Size
2014-20207443
2000-20133057
1994-19962057
1983-19852057
1964-19821157
1958-19631034

Bulb Specifications

Description Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T20), natural amber glass. 12V, 21W/5W.7444NA
ANSI standard (US & Canada). Dual-filament wedge bulb (T20), natural amber glass. 12V, 21W/5W.7443NA
ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W.4157NA
Sylvania part number for a coated variant of the ANSI 3157 bulb. Dual-filament wedge bulb (T25), amber coating. 12V, 27W/7W.5702AK
ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W.3457NA
ANSI standard (US & Canada). Single-filament wedge bulb (T25), natural amber glass. 12V, 27W.3357NA
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. Brighter variant of 1157. 12V, 26.9W/8W.2057NA
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. 12V, 21W/5W.1157NA
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. Variant of 1157. 12V, 21/5W.1034NA
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.1157
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W.1034
ANSI standard (US & Canada). Dual-filament wedge bulb (T20). 12V, 21W/5W.7443
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.3057
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Brighter variant of 1157. 12V, 26.9W/8W.2057

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