Chevrolet G-Van Check Engine Bulb Size

Chevrolet G-Van check engine bulb size specifications include 74 and 194 bulb options for this vehicle model. The replacement chart covers 1992 to 1995 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
1995	74
1992-1994	194

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, 3.78W.	194

Other Locations

Additional Notes

The Chevrolet G-Van check engine light uses two different bulb sizes across its 1992-1995 model years: the 74 for the 1995 model year and the 194 for the 1992-1994 model years.
Both the 74 and 194 are ANSI-standard miniature wedge bulbs rated at 12 volts, making them compatible with standard automotive electrical systems.
The 74 bulb follows the T5 form factor, while the 194 follows the larger T10 form factor. These two sizes are not interchangeable despite sharing the same wedge-base design.
The 74 bulb is rated at 1.4 watts, whereas the 194 draws 3.78 watts. The 1995 G-Van therefore uses a lower-wattage bulb for its check engine indicator than the 1992-1994 models.
The T5 and T10 designations refer to the tubular envelope width of each bulb, measured in units of one-eighth of an inch. The T10 of the 194 is physically wider than the T5 of the 74, which contributes to their incompatibility as direct substitutes.
Both bulb types carry ANSI recognition in both the United States and Canada, indicating standardized performance and dimensional specifications across North American markets.