Chevrolet Silverado Courtesy Bulb Size

Additional Notes

• The 212-2 is the most frequently specified courtesy bulb across the Chevrolet Silverado lineup, appearing in model years 2007-2014.
• The 212-2 is a festoon-type bulb with an SV8.5 base, a 41mm length, and operates at 12V with a 12W output, conforming to ANSI standards for the US and Canada.
• The 211-2, specified for the 1999 Silverado, shares the same physical and electrical characteristics as the 212-2, including the 41mm festoon format, SV8.5 base, 12V supply, and 12W rating. Despite these similarities, the two carry distinct ANSI designations and are not listed interchangeably in these specifications.
• The 194 is a T10 miniature wedge bulb rated at 12V and 3.78W, representing a significantly lower wattage than the festoon types used in other model years.
• The 74 is a T5 miniature wedge bulb rated at 12V and 1.4W, the lowest-wattage type among all bulbs listed in these specifications.
• In the 2005 Chevrolet Silverado, courtesy bulb fitment is split by trim level: the 1500 uses the 194, while the 2500/3500 HD uses the 74, making the two sub-models incompatible with each other's bulb type.
• The 2014 Silverado specifies the 212-2 for rear courtesy lighting on the 2500/3500 HD only, indicating a position-specific and trim-specific fitment for that year.
• The 194 and 74 are both miniature wedge-base bulbs, but their T10 and T5 designations reflect different physical sizes, meaning they are not interchangeable despite sharing the same base style category.
• Across the years 2000-2003, the Silverado alternates between the 74 and 194 bulb types, with the 74 used in 2000-2001 and 2003, and the 194 used in 2002 and 2004.