Oldsmobile Silhouette front fog light bulbs utilize 880, 896, or H1 size specifications, while rear fog light bulbs require P21W size. The replacement chart covers vehicle production spanning 1993 to 2004.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Oldsmobile Silhouette front fog light uses three distinct bulb types across its model years: the 880, 896, and H1, all of which are single-filament halogen bulbs operating at 12 volts.
The 880 bulb is the specified front fog light size for the Oldsmobile Silhouette from 2001-2004. It follows the ANSI standard used in the US and Canada, carries a PG13 base, and is rated at 27 watts.
The 896 bulb serves the front fog light position for model years 1997-2000. Also an ANSI-standard halogen bulb for the US and Canadian market, it uses a PGJ13 base and draws 37.5 watts, making it notably higher in wattage than the 880.
Although the 880 and 896 are both ANSI single-filament halogen bulbs, their base types differ: PG13 versus PGJ13. These bases are not interchangeable, so substituting one bulb for the other is not physically compatible.
The H1 bulb is specified for the front fog lights on the Silhouette from 1993-1996. Unlike the 880 and 896, the H1 follows the ECE standard used in Europe and worldwide, though it also carries approval for use in the US and Japan.
The H1 operates at 55 watts, which is significantly higher than both the 880 and 896. It uses a P14.5s single-pin base, a design that is mechanically distinct from the PG13 and PGJ13 bases used in later model years.
The transition from H1 to 896 between the 1996 and 1997 model years represents a shift from an ECE-standard bulb to an ANSI-standard bulb, accompanied by a reduction in wattage from 55W to 37.5W.
The P21W bulb is specified for the rear fog light on the 1995-1996 Silhouette, with the notation "(Export)" indicating this application is intended for markets outside North America. It follows the ECE standard and uses a BA15s bayonet base at 12V, 21W.
The P21W is a single-filament signalling bulb, which is a functional category distinct from the halogen fog light bulbs used in the front position. Its BA15s bayonet base is a common format in ECE-regulated markets.
The front fog light bulb types across all listed years of the Silhouette are mutually incompatible due to differing base designs, meaning a bulb from one era of the vehicle cannot be fitted into a housing from another without modification.