Chevrolet Silverado Seat Belt Warning Bulb Size

The Chevrolet Silverado seat belt warning bulb uses a PC74 size. The replacement chart covers 1999 to 2002 vehicle production years 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.

Bulb Size by Year Range

Years	US Type	EU Type	Shop
1999-2002	PC74	T5+PCB	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Miniature wedge bulb (T5) with printed circuit board twist-lock socket, for instrument clusters. 12V, 1.4W.	PC74	Check Price

Other Locations

Additional Notes

The PC74 is the seat belt warning bulb size for the Chevrolet Silverado across the 1999-2002 model years.
The PC74 is an ANSI-standardized bulb type, meaning it conforms to a defined set of electrical and physical specifications recognized across the United States and Canada.
The PC74 belongs to the T5 bulb family, which refers to a tubular miniature wedge form factor approximately 5/8 of an inch wide at its widest point.
The bulb operates at 12 volts and draws 1.4 watts, placing it in the very low wattage range typical of instrument cluster indicator lighting.
The PC74 uses a printed circuit board twist-lock socket, a mounting style designed specifically for direct integration into printed circuit boards found in instrument clusters rather than conventional wiring harness sockets.
The twist-lock retention method means the bulb is secured by rotating it into position, which distinguishes it from standard push-in wedge bulbs that share a similar T5 form factor but use different socket types.
Because the PC74 relies on a printed circuit board twist-lock socket, substituting a standard T5 wedge bulb without the correct base type would result in an incompatible fitment even if the outer bulb shape appears similar.