GMC C2500 Map Light Bulb Size

The GMC C2500 map light utilizes 168 and 211-2 bulb sizes for the interior illumination system. Data for the specific components covers the period from 1993 through 2000.

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
2000	211-2
1998-1999	168
1996-1997	211-2
1995	168
1994	211-2
1993	168

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	211-2
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168

Other Locations

Additional Notes

The GMC C2500 map light uses two distinct bulb types across its model years: the 211-2 and the 168, both of which conform to ANSI standards recognized in the United States and Canada.
The 211-2 is a festoon-style bulb with a 41mm length and an SV8.5 base, operating at 12 volts and drawing 12 watts. Festoon bulbs are cylindrical lamps that mount by pressing their end caps into spring clips rather than inserting into a socket.
The 168 is a T10 miniature wedge bulb, operating at 12 volts and drawing 4.9 watts. Wedge bulbs are held in place by friction from the socket walls rather than a threaded or bayonet base.
The 211-2 and 168 are not interchangeable. They differ in base type, physical form, and wattage, meaning a socket designed for one will not properly accept the other.
The GMC C2500 uses the 211-2 bulb for the 1994, 1996-1997, and 2000 model years.
The 168 bulb applies to the 1993, 1995, and 1998-1999 model years of the C2500.
The wattage difference between the two bulbs is notable. The 211-2 draws 12 watts while the 168 draws 4.9 watts, reflecting a significant difference in power consumption for the map light circuit.
Because the bulb type alternates across model years rather than following a single continuous specification, confirming the exact model year before sourcing a replacement is necessary for proper fitment.