GMC Yukon Map Light Bulb Size

Additional Notes

• The GMC Yukon map light specifications reference three distinct bulb sizes across the listed model years: 212-2, 211-2, and 168.
• The 211-2 and 212-2 are both festoon-type bulbs with an SV8.5 base and a 41mm length, operating at 12V and 12W under the ANSI standard applicable in the US and Canada.
• The 168 is a miniature wedge bulb of the T10 type, rated at 12V and 4.9W, also conforming to the ANSI standard for the US and Canada.
• Festoon bulbs are cylindrical lamps held in place by spring-loaded contacts at each end rather than a screw or plug-in base, which is the function served by the SV8.5 base designation on the 211-2 and 212-2.
• The T10 designation on the 168 bulb refers to a tubular wedge form factor approximately 10/8 of an inch wide, with the wedge base acting as its own retaining mechanism without a separate socket pin.
• The 211-2 is specified for the GMC Yukon across 1992 and 1995-1998, making it the most frequently listed map light bulb size in these specifications.
• Because the 211-2 and 212-2 share the same base type, voltage, wattage, and physical length, they are functionally interchangeable in most fitment contexts.
• The 168 wedge bulb draws significantly less wattage than the festoon types, which reflects a fundamental difference in bulb construction rather than a variation within the same bulb family.
• The 168 and the 211-2 or 212-2 use incompatible base types, meaning a wedge socket and a festoon socket are not interchangeable regardless of voltage compatibility.
• The 2014 GMC Yukon uses the 212-2, while model years 1993-1994 and 1999 use the 168, placing these years in a separate fitment category from the festoon-equipped model years.