The Oldsmobile Silhouette tail light utilizes 3057, 194, and 2057 bulb sizes for the rear illumination system. Data for the specified components covers the range from 1990 through 2004.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 3057 is the most frequently specified bulb across the Oldsmobile Silhouette lower tail light positions, covering model years 1997-2004 without variation. It is an ANSI-standard dual-filament wedge bulb in a T25 form factor, rated at 12V with filaments drawing 27W and 7W respectively.
The 2057 also recurs across multiple lower tail light positions on the Silhouette, appearing in model years 1990-1991, 1993-1995, and again in the 1996 export configuration. Like the 3057, it is an ANSI-standard dual-filament bulb, though it uses a BAY15d bayonet base rather than a wedge mount, and is rated at 12V with filaments drawing 26.9W and 8W.
The 2057 is described as a brighter variant of the 1157, sharing the same BAY15d bayonet base. This base type uses two pins of unequal spacing to prevent incorrect insertion, a design that distinguishes it from wedge-base bulbs in the same application category.
The 3057 and 2057 are both dual-filament ANSI bulbs serving the same lower tail light position on the Silhouette, but they use different base types and are not interchangeable. The 3057 uses a wedge base while the 2057 uses a BAY15d bayonet base.
The 194 is specified for the Silhouette lower tail light in 1992 and 1996. It is a single-filament miniature wedge bulb in a T10 form factor, rated at 12V and 3.78W, which places it in a significantly lower power class than the dual-filament bulbs used in surrounding model years.
The 12961 is a Philips part number rather than an ANSI designation, specified for the 1995 export lower tail light position. It is a miniature wedge bulb using a W2.1x9.5d base, rated at 12V and 5W, placing it in the same general size class as the 194 but under a manufacturer-specific rather than standardized designation.
Export configurations for the 1995-1996 Silhouette use different bulb standards than domestic versions. The upper tail light on the 1996 export model calls for the P21/4W, an ECE-standard dual-filament bulb with a BAZ15d bayonet base rated at 12V with 21W and 4W filaments, a specification not found in any domestic Silhouette position listed.
The BAZ15d base used by the P21/4W differs from the BAY15d base used by the 2057. Both are offset bayonet bases designed to prevent incorrect bulb installation, but the pin offset geometry differs between the two, making them incompatible with each other's sockets.
The T10 wedge form factor is shared by both the 194 and the 12961, though the two bulbs use different base contact designations. The 194 follows ANSI standards while the 12961 carries a W2.1x9.5d base specification associated with ECE and manufacturer-defined classifications.
Across the Silhouette lower tail light specifications, the transition from the 2057 in 1995 to the 3057 in 1997 represents a shift from a bayonet-base dual-filament bulb to a wedge-base dual-filament bulb, with the two types requiring different socket designs and therefore not being interchangeable despite similar wattage ratings.