Chevrolet C-Series Pickup Instrument Panel Bulb Size

Additional Notes

• The Chevrolet C-Series Pickup instrument panel draws from four distinct ANSI-standard miniature wedge bulb types across its model year range: the 194, 74, 161, and 168.
• The 194 is the most frequently specified bulb across this range, appearing in the 1980 and 1986-2000 model years (excluding 1987, 1993, 1996-1998). It is a T10 wedge bulb rated at 12V and 3.78W.
• The 168 bulb is a T10 wedge type rated at 12V and 4.9W, making it the highest-wattage bulb among the four types listed. It is specified for the 1975-1978 and 1981-1984 model years.
• Although the 194 and 168 share the same T10 wedge form factor, their wattage ratings differ significantly at 3.78W and 4.9W respectively, which means they are not interchangeable without accounting for that power difference.
• The 161 is a T10 wedge bulb rated at 12V and 1W, the lowest wattage among the T10 types in these specifications. It is specified for the 1979, 1985, and 1996-1997 model years of the C-Series Pickup.
• Because the 194, 161, and 168 all share the T10 wedge form factor, physical fitment alone does not confirm electrical compatibility, as their wattage ratings of 3.78W, 1W, and 4.9W respectively are distinct.
• The 74 is a T5 wedge bulb rated at 12V and 1.4W, and it is the only T5-type bulb in these specifications. Its smaller form factor distinguishes it physically from the three T10 types and makes it non-interchangeable with them.
• The 74 bulb is specified for the Chevrolet C-Series Pickup in the 1993 and 1998 model years, representing isolated fitment years within an otherwise T10-dominated specification range.
• All four bulb types in these specifications conform to ANSI standards applicable in both the United States and Canada, indicating a standardized North American classification system governs their designations.
• All listed bulbs operate at 12V, consistent with the standard electrical system voltage of conventional passenger and light-duty commercial vehicles.