Chevrolet Astro Fog Light Bulb Size

Chevrolet Astro front fog light bulbs use a 885 size bulb for this vehicle model. The replacement chart covers 1990 to 1994 production years with corresponding bulb size specifications.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Front Fog Light

Years	Bulb Size
1990-1994	885

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament halogen bulb with PGJ13 base. 12V, 50W.	885

Other Locations

Additional Notes

The 885 bulb is the sole front fog light specification across all listed model years of the Chevrolet Astro, covering 1990-1994.
The 885 is a single-filament halogen bulb, meaning it serves one lighting function only and cannot be wired to produce a secondary output such as a high-beam effect.
It operates at 12 volts and draws 50 watts, which places it in a moderate power range typical of halogen fog lighting applications.
The 885 uses a PGJ13 base, a proprietary pin-and-groove mount that physically prevents substitution with bulbs carrying incompatible bases, even when voltage and wattage ratings are otherwise similar.
The 885 conforms to ANSI standards recognized in both the United States and Canada, indicating the bulb meets a defined set of performance and dimensional criteria established for North American automotive use.
Because the PGJ13 base is specific to a limited range of bulb types, substitution requires confirmation that a replacement shares both the base type and the 12V/50W electrical rating to avoid socket damage or premature failure.