Chevrolet Camaro Seat Belt Warning Bulb Size

Chevrolet Camaro seat belt warning bulb sizes include 161, 74, and 158 specifications for the replacement bulb. The chart covers vehicle production data spanning 1973 to 2002.

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
1992-2002	161
1991	74
1990	158
1977-1989	194
1973	194

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 1W.	161
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 1.4W.	74
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3W.	158
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194

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Additional Notes

The Chevrolet Camaro seat belt warning bulb specifications cover model years 1973 through 2002, with four distinct bulb sizes used across that span: 161, 74, 158, and 194.
The 194 bulb is the most frequently specified size in these records, covering the Chevrolet Camaro from 1973 and again from 1977 through 1989. It is an ANSI-standard miniature wedge bulb in a T10 form factor, rated at 12V and 3.78W.
The 161 bulb is the second most common size, specified for the Chevrolet Camaro across 1992-2002. It is also an ANSI-standard T10 miniature wedge bulb, but rated at a lower 1W, making it the least power-consuming bulb among those listed.
Although the 161 and 194 bulbs share the same T10 wedge form factor, their wattage ratings differ significantly, at 1W and 3.78W respectively. This difference means the two types are not interchangeable despite their physical similarity.
The 158 bulb was specified for the 1990 Camaro. It is an ANSI-standard T10 miniature wedge bulb rated at 12V and 3W, placing its power output between the 161 and 194 types.
The 74 bulb was specified for the 1991 Camaro. Unlike the other three bulb sizes in these specifications, it uses a smaller T5 wedge form factor rather than T10, making it physically incompatible with sockets designed for T10 bulbs.
The 1990 and 1991 model years each use a unique bulb size, the 158 and 74 respectively, neither of which appears in any other year within these specifications. Substituting one for the other would involve both a wattage mismatch and, in the case of the 74, a different physical form factor.
All four bulb sizes listed are governed by ANSI standards applicable in both the United States and Canada, indicating a standardized electrical rating system shared across the North American market.
All bulbs in these specifications operate at 12V, consistent with the standard electrical system voltage found in conventional passenger vehicles.
The shift from the 194 bulb to the 158 in 1990, then to the 74 in 1991, and finally to the 161 from 1992 onward reflects three consecutive bulb changes across a short span of model years in the Camaro seat belt warning circuit.