The Peterbilt 376 uses a 194 bulb size for front side marker applications and an 1816 bulb size for rear side marker applications. The replacement chart covers vehicle production spanning 1988 to 1999 with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Peterbilt 376 uses two distinct bulb types across its side marker positions: the 194 for front side markers and the 1816 for rear side markers.
Both the 194 and 1816 are ANSI-standardized miniature wedge bulbs rated at 12 volts, making them compatible with standard 12V automotive electrical systems.
The 194 bulb follows the T10 wedge form factor and draws 3.78 watts, placing it among the lower-wattage options in the miniature wedge category.
The 1816 bulb uses the smaller T3.25 wedge form factor and draws 4 watts, making it physically distinct from the 194 despite both being wedge-base types.
Because the T10 and T3.25 wedge bases differ in size, the 194 and 1816 are not interchangeable, even though both operate at 12 volts with similar wattage ratings.
The Peterbilt 376 front side marker position uses the 194 bulb across all listed model years from 1988-1999.
The rear side marker position uses the 1816 bulb across all listed model years from 1988-1996.
Both bulb types carry ANSI standardization recognized in the United States and Canada, meaning equivalent bulbs from different manufacturers are produced to the same dimensional and electrical specifications.