Chevrolet Corvette Parking Light Bulb Size

Additional Notes

• The Chevrolet Corvette parking light specifications span from 1953 to 2013, covering six distinct bulb types across that range: 1154, 1034, 1034NA, 1157, 1157NA, 2057NA, 4157NA, and 5702AK.
• The 4157NA is the most frequently specified bulb in the later portion of the range, appearing in the Chevrolet Corvette across 1997-2001, 2003-2004, 2006-2007, 2009-2011, and 2013. It is a dual-filament T25 wedge bulb rated at 12V with a 27W high filament and 7W low filament, constructed with natural amber glass rather than a coating.
• The 5702AK, a Sylvania-designated coated variant of the ANSI 3157 bulb, shares the same T25 wedge form and 12V/27W/7W electrical rating as the 4157NA. It is specified for 1999, 2002, 2005, 2008, and 2012, meaning the two bulbs alternate across several model years in the same position.
• Because the 4157NA uses natural amber glass and the 5702AK uses an amber coating to achieve color, they are not interchangeable without affecting the optical output, even though their electrical ratings are identical.
• The 2057NA is specified for 1984-1996 and uses a BAY15d bayonet base rather than the wedge base of the later T25 types. At 12V with a 26.9W high filament and 8W low filament, it draws slightly more power on the low filament than the 1157 it is derived from, making it a brighter variant of that base type.
• The 1157NA and 1034NA are both natural amber glass variants of the 1157, sharing its BAY15d base and 12V/21W/5W rating. The 1157NA is specified for 1973-1975, 1977-1979, while the 1034NA covers 1968-1971, 1976, 1980-1981. Despite their different ANSI numbers, their electrical characteristics are equivalent.
• The base 1157 without a suffix, rated at 12V/21W/5W with a BAY15d bayonet base and a clear glass envelope, is specified for 1964-1967, 1972, and 1982. It is not interchangeable with the 1157NA or 1034NA in applications where amber output is required by regulation, as it produces white light.
• The 1034 without a suffix, a clear-glass variant of the 1157 type with the same BAY15d base and 12V/21W/5W rating, is specified for 1955-1963. Like the base 1157, it lacks the amber glass of its NA-designated counterparts.
• The 1154 is the earliest bulb type in the specifications, listed for the 1953-1954 Corvette. It uses a BAY15d bayonet base and is rated for both 6V and 12V operation, distinguishing it from all other types in the range, which are rated exclusively at 12V.
• The BAY15d bayonet base is shared across the 1034, 1034NA, 1154, 1157, 1157NA, and 2057NA types, but differences in voltage rating, wattage, and glass color mean that base compatibility alone does not establish interchangeability among them.