Chevrolet Chevette High Beam Indicator Bulb Size

Additional Notes

• The Chevrolet Chevette uses two bulb sizes for the high beam indicator across its model years: the 161 and the 194. Both are ANSI-standardized miniature wedge bulbs of the T10 type, rated at 12 volts.
• The 194 bulb draws 3.78 watts, while the 161 draws 1 watt. Despite sharing the same T10 wedge form factor and voltage rating, the wattage difference between them means they are not interchangeable without affecting circuit load.
• The 194 bulb was fitted to the Chevrolet Chevette from 1976 through 1982, with the exception of 1983, and again in 1984. The 161 bulb was used in 1983 and then from 1985 through 1987.
• The year 1984 stands as an isolated return to the 194 bulb, positioned between two periods of 161 fitment. This makes 1984 a notable exception when sourcing a replacement for mid-1980s Chevette models.
• The T10 wedge base is a pinless design in which the bulb is held in its socket by the tension of the glass envelope itself. Both the 161 and 194 share this base type, which is why physical installation is possible with either bulb even though the wattage ratings differ.
• Both bulb types carry ANSI standardization applicable to the United States and Canada, meaning the specifications reflect North American market fitment for the Chevette.