Chevrolet Avalanche Parking Light Bulb Size

The Chevrolet Avalanche parking light requires bulb sizes 3157NA, 4157NA, or 5702AK depending on the specific version of the component. Data for the bulb sizes covers the range from 2007 to 2013.

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
2010-2013	3157NA
2009	4157NA
2008	5702AK
2007	4157NA

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W.	3157NA
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

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Additional Notes

The parking light bulb specifications for the Chevrolet Avalanche span the 2007-2013 model years, with three distinct bulb types referenced across that range: 3157NA, 4157NA, and 5702AK.
The 3157NA is the most frequently specified bulb in these records, covering the 2010-2013 model years. It is an ANSI-standardized dual-filament wedge bulb in the T25 form factor, rated at 12V with a 27W high filament and 7W low filament, and features natural amber glass rather than a coating or cap.
The 4157NA shares the same ANSI classification, T25 form factor, and 12V/27W/7W electrical ratings as the 3157NA. Both bulbs are natural amber glass and are physically similar, though they carry different ANSI part numbers, which indicates they are not considered interchangeable within the scope of these specifications.
The 5702AK is a Sylvania-specific part number rather than an ANSI designation. It is a variant of the ANSI 3157 bulb and shares the same T25 form factor and 12V/27W/7W ratings, but its amber color is produced by a coating applied to the glass rather than by the glass composition itself.
The distinction between natural amber glass (as in the 3157NA and 4157NA) and an amber-coated bulb (as in the 5702AK) is relevant to fitment. Coated bulbs can produce slightly different light output characteristics and may not be listed as direct substitutes for their natural amber counterparts in all applications.
The 2008 Avalanche is the only model year in these records specified to use the 5702AK, making it the sole year tied to a manufacturer-branded part number rather than a universal ANSI designation for this application.
The 4157NA is specified for the 2007 and 2009 model years. Despite its technical similarity to the 3157NA, the separate ANSI numbering reflects a recognized distinction between the two, and substitution between them is not supported by these specifications.