The Pontiac Trans Sport brake light uses 2057 and 3057 bulb sizes depending on the specific version of the vehicle. The provided data covers a range from 1990 to 1998.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Pontiac Trans Sport brake light specifications cover model years 1990-1998, with two distinct bulb types used across that span depending on the year.
The 2057 bulb is the most frequently specified type in these records, covering the Trans Sport's brake lights across 1990-1996.
The 2057 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V with filaments drawing 26.9W and 8W respectively, where the higher wattage filament serves the stop function and the lower wattage filament serves the tail light function.
The 1997-1998 Trans Sport brake lights use the 3057 bulb instead, which is a dual-filament wedge-style T25 bulb rated at 12V, 27W/7W.
Although the 2057 and 3057 share a dual-filament design and similar wattage ratings, they use different base types, the 2057 uses a BAY15d bayonet base while the 3057 uses a wedge base, making them physically non-interchangeable.
The center high mount stop light on the 1994-1996 Trans Sport uses the 561 festoon bulb, which is a single-filament type with end-cap contacts and a 44mm length, rated at 12V, 12W.
The 1990-1991 Trans Sport center high mount stop light uses the 891 bulb, a single-filament halogen type with a PGJ13 base, rated at 12V, 27W, which operates at a significantly higher wattage than the 561 festoon bulb used in later years.
The 561 and 891 bulbs are not interchangeable, as they differ in both base type and physical form, the 561 being a festoon bulb and the 891 using a PGJ13 pin base.
All four bulb types in these specifications conform to ANSI standards applicable in both the United States and Canada.
The center high mount stop light data does not include entries for 1992-1993, meaning only the standard brake light bulb size of 2057 is specified for those years.