Peterbilt 349 Dome Light Bulb Size

The Peterbilt 349 dome light requires a bulb size of 97 for the interior lighting fixture. Data for the specific bulb requirements covers the range from 1986 to 1987.

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
1986-1987	97 (With 2 Rectangular Headlamps)

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 13W.	97

Other Locations

Additional Notes

The bulb type 97 follows the ANSI standard recognized in both the United States and Canada, operating at 12 volts with a 13-watt output and a single filament.
The 97 bulb uses a BA15s bayonet base, which is a single-contact bayonet mount with a 15mm collar.
The 97 bulb is a variant of the more widely known 1156, though the two are not necessarily interchangeable in all applications due to differences in wattage and light output.
The Peterbilt 349 uses the 97 bulb size for the dome light across the 1986-1987 model years, specifically in configurations fitted with 2 rectangular headlamps.
The headlamp configuration is a stated fitment condition, meaning the 97 bulb specification applies only to the 2 rectangular headlamp variant of the 349 and not to other headlamp configurations.