Chevrolet C-Series Pickup High Beam Indicator Bulb Size

Chevrolet C-Series Pickup high beam indicator bulb sizes include 74, 161, and 168 specifications for the dashboard illumination component. The replacement chart covers 1980 to 2000 vehicle production years with corresponding bulb size data.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1998-2000	74
1997	161
1996	74
1988-1995	161
1980-1986	168

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 1.4W.	74
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 1W.	161
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168

Other Locations

Additional Notes

The Chevrolet C-Series Pickup uses three distinct bulb sizes for the high beam indicator across its model years: 74, 161, and 168, all of which conform to ANSI standards recognized in both the United States and Canada.
All three bulb types are miniature wedge-base designs, meaning they use a wedge-shaped plastic base rather than a metal contact pin, and they seat directly into a socket without a separate holder.
The bulb 74 is a T5 wedge type rated at 12V and 1.4W, and it appears in the Chevrolet C-Series Pickup for the 1996 and 1998-2000 model years.
The bulb 161 is a T10 wedge type rated at 12V and 1W, covering the 1988-1995 model years, with the exception of 1996, which reverts to the 74.
The bulb 168 is also a T10 wedge type but is rated at a notably higher 4.9W compared to the 161, and it is specified for the 1980-1986 model years.
Although the 161 and 168 share the same T10 wedge form factor, their wattage ratings differ significantly, at 1W versus 4.9W respectively, which means they are not interchangeable without accounting for the electrical load difference in the circuit.
The 1997 model year uses the 161 bulb, while the immediately surrounding years of 1996 and 1998 use the 74, indicating that the same physical model year range did not consistently use a single bulb type throughout the 1990s.