Chevrolet C-Series Pickup Parking Brake Indicator Bulb Size

Additional Notes

• The parking brake indicator bulb specifications for the Chevrolet C-Series Pickup span model years 1985-2000 and reference three distinct ANSI-standard bulb sizes: 74, 194, and 168.
• The 194 bulb is the most frequently specified across this range, appearing in the 1988-1991 and 1994-1998 model years. It is a T10 miniature wedge bulb rated at 12V and 3.78W.
• The 74 bulb is a T5 miniature wedge type rated at 12V and 1.4W, making it the lowest-wattage option among the three sizes listed. It is specified for the 1993, 1999, and 2000 model years.
• The 168 bulb shares the T10 wedge form factor with the 194 but draws more power at 4.9W. It is specified for the 1985-1986 model years.
• Although the 168 and 194 bulbs share the same T10 wedge base, their wattage ratings differ. Substituting one for the other may affect indicator brightness and circuit load.
• The T5 form factor of the 74 bulb is physically smaller than the T10 form factor of the 194 and 168 bulbs, meaning the 74 is not interchangeable with either of the other two sizes on a physical basis alone.
• All three bulb sizes conform to ANSI standards recognized in both the United States and Canada, and all operate on a 12V electrical system consistent with standard automotive applications.
• The specified bulb size changes between certain consecutive model years, such as the shift from the 194 in 1994-1998 to the 74 in 1999-2000, indicating that the correct size for a given year warrants verification before replacement.