Chevrolet Blazer Dome Light Bulb Size

Additional Notes

• The 562 and 211-2 are both festoon-type bulbs, meaning they are cylindrical lamps that mount horizontally between two spring-loaded contacts or a fixed base within the dome light housing.
• Both bulb types operate at 12 volts and 12 watts, placing them in the same electrical category despite their physical differences.
• The 562 bulb measures 44mm in length and uses end-cap contacts, where the electrical connection is made at each end of the bulb body rather than through a dedicated base.
• The 211-2 bulb measures 41mm in length and uses an SV8.5 base, a standardized festoon base type that positions the bulb within a specific socket configuration.
• The 3mm difference in length between the 562 and 211-2 makes them physically non-interchangeable, even though their voltage and wattage ratings are identical.
• The Chevrolet Blazer (1997) is the only model year in these specifications that requires two different dome light bulbs, with the 562 designated for the front position and the 211-2 for the rear center position.
• The 562 bulb applies to the 1998-2003 model years, while the 211-2 applies to 1974 and the 1987-1996 range, with 1997 requiring both types depending on position.