GMC Savana front parking light bulb uses 3157 size, with additional parking light positions accommodating 3157 and 2057NA sizes. The replacement chart covers vehicle production spanning 1996 to 2020.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The GMC Savana uses the 3157 bulb for the front parking light across the 2003-2020 model years, making it the predominant fitment in these specifications.
The 3157 is a dual-filament T25 wedge bulb rated at 12V with a high filament draw of 27W and a low filament draw of 7W, conforming to ANSI standards recognized in both the US and Canada.
Its dual-filament design allows a single bulb to serve two lighting functions at different brightness levels, which is typical in positions that combine parking and stop or turn signal duties.
The 1996-2002 GMC Savana front parking light takes the 2057NA bulb instead of the 3157, representing a distinct fitment from the later model years.
The 2057NA uses a BAY15d bayonet base, which is physically incompatible with the wedge socket used by the 3157, meaning the two bulb types are not interchangeable despite their similar wattage ratings.
The 2057NA is a natural amber glass bulb, meaning the color is produced by the glass envelope itself rather than by a lens or coating external to the bulb.
The 2057NA is rated at 12V with filament draws of 26.9W and 8W, and it is classified as a brighter variant of the 1157 bulb within the same BAY15d bayonet base family.
Although the 3157 and 2057NA share a dual-filament configuration and similar voltage and wattage ratings, their differing base types mean socket compatibility must be confirmed before any substitution is attempted.