Chevrolet Silverado Stepwell Bulb Size

Chevrolet Silverado stepwell bulb sizes include 168 and 194, with each bulb size corresponding to specific vehicle configurations. The replacement chart covers 1999 through 2006 production years and details bulb size specifications for stepwell applications.

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
2001-2006	168
1999-2000	168 (Door Light)
1999-2000	194 (Stepwell Light)

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194

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Additional Notes

The Chevrolet Silverado stepwell bulb specifications cover model years 1999 through 2006.
The 168 bulb is the most frequently specified type across these years, appearing as the sole stepwell bulb size for the 2001-2006 model years and as the door light bulb for 1999 and 2000.
The 168 is an ANSI-standard miniature wedge bulb in the T10 form factor, rated at 12 volts and 4.9 watts.
The 194 bulb is an ANSI-standard miniature wedge bulb also in the T10 form factor, rated at 12 volts and 3.78 watts, making it slightly lower in wattage than the 168.
For the 1999 and 2000 Chevrolet Silverado, the stepwell light and door light positions use different bulb sizes, with the 194 assigned to the stepwell light and the 168 assigned to the door light.
Although both the 168 and 194 share the T10 wedge form factor, their wattage ratings differ, and the two types are not listed interchangeably within these specifications.
Both bulb types conform to ANSI standards applicable in the United States and Canada.