Chevrolet Camaro Parking Brake Indicator Bulb Size

Additional Notes

• The parking brake indicator bulb for the Chevrolet Camaro spans model years 1967 through 2002, with four distinct bulb sizes specified across that range: 194, 1816, 158, 74, and 161.
• The 194 bulb is the most widely used size in these specifications, covering the Camaro from 1967 through 1989, with the sole exception of 1968. It is an ANSI-standard T10 miniature wedge bulb rated at 12V and 3.78W.
• The 161 bulb is the second most frequently specified size, fitted to the Camaro from 1993 through 2002. It is also a T10 miniature wedge bulb but operates at a lower wattage of 1W at 12V, making it less power-intensive than the 194.
• Although both the 161 and 194 share the T10 wedge form factor, their wattage ratings differ significantly, at 1W and 3.78W respectively, which means they are not interchangeable without accounting for that electrical difference.
• The 1968 Camaro is the only model year specified with the 1816 bulb, an ANSI-standard T3.25 miniature wedge type rated at 12V and 4W, distinguishing it from all surrounding model years that use the 194.
• The 1990 Camaro uses the 158 bulb, an ANSI-standard T10 miniature wedge rated at 12V and 3W. While it shares the T10 form factor with the 194 and 161, its wattage sits between those two values.
• The 1991-1992 Camaro uses the 74 bulb, an ANSI-standard T5 miniature wedge rated at 12V and 1.4W. The T5 form factor is physically smaller than the T10 used in surrounding model years, making cross-substitution with T10 bulbs incompatible.
• The transition from the 194 bulb to the 158 in 1990, then to the 74 in 1991-1992, and finally to the 161 from 1993 onward reflects several distinct fitment changes across the later production years of this generation.
• All bulb sizes listed in these specifications conform to ANSI standards applicable in both the United States and Canada, and all operate on a 12V electrical system.
• The T5 designation of the 74 bulb indicates a tubular envelope roughly 5/8 of an inch wide, while the T10 designation used by the 161, 158, and 194 indicates a wider tubular envelope of approximately 10/8 of an inch, a distinction relevant to socket fitment.