Chevrolet Astro Instrument Panel Bulb Size

Additional Notes

• The PC74 bulb is the most frequently specified instrument panel bulb across the Chevrolet Astro's production span, appearing in nine of the twenty-three model year entries. It is a T5 miniature wedge bulb rated at 12V and 1.4W, fitted with a printed circuit board twist-lock socket designed specifically for instrument cluster applications.
• The PC161, PC195, and PC194 bulbs share the same T10 miniature wedge form factor and printed circuit board twist-lock socket construction, though they differ in wattage. The PC194 is rated at 3.78W, while the PC161 is rated at 1W, and no wattage value is listed for the PC195 in the specifications.
• The standard 194 bulb, used in the 1995, 1991, and 1988-1987 model years, is a T10 miniature wedge rated at 12V and 3.78W. It shares its voltage and wattage rating with the PC194 but lacks the printed circuit board twist-lock socket, making the two bulbs non-interchangeable despite their identical electrical ratings.
• The 168 bulb, specified for the 1992 and 1990 model years, carries the highest wattage among all bulbs listed, at 4.9W. It is a T10 miniature wedge operating at 12V, and its higher power draw distinguishes it from the other T10 variants in these specifications.
• The 1994 Chevrolet Astro requires different bulbs depending on instrument cluster configuration. Vehicles equipped with a digital instrument cluster take the PC161, while those without the digital cluster take the PC74, making cluster type a necessary consideration before selecting a replacement bulb for that model year.
• The 1993 model year presents the same configuration split, with the PC195 specified for vehicles with a digital instrument cluster and the PC74 for those without. Both the PC195 and PC161 are T10 PC-socket bulbs, but they are distinct part numbers and are not listed as interchangeable within these specifications.
• All bulbs listed across the full model range conform to ANSI standards applicable in both the United States and Canada, operating on a 12V electrical system consistent with standard automotive architecture.
• The PC-prefix bulbs (PC74, PC161, PC195, PC194) are distinguished from their non-PC counterparts by their printed circuit board twist-lock sockets. This socket type is specific to instrument cluster printed circuit boards and is not compatible with conventional bulb holders used elsewhere in a vehicle's lighting system.