Chevrolet Bel Air Parking Light Bulb Size

The Chevrolet Bel Air parking light utilizes unique bulb sizes 1034NA, 1157NA, 1157, 1034, and 1154 depending on the specific production period. Available data covers the range from 1950 through 1975.

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

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
1975	1034NA	1034NA	Check Price
1974	1157NA	P21/5W	Check Price
1964-1973	1157	P21/5W	Check Price
1955-1963	1034	1034	Check Price
1950-1954	1154	1154	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. Variant of 1157. 12V, 21/5W.	1034NA	Check Price
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. 12V, 21W/5W.	1157NA	Check Price
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W	Check Price
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157	Check Price
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W.	1034	Check Price
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Older variant of 1157. 6V/12V.	1154	Check Price

Other Locations

Additional Notes

The 1157 bulb is the most frequently specified parking light bulb across the Chevrolet Bel Air model years covered, appearing in every year from 1964 through 1973. It is a dual-filament bulb with a BAY15d bayonet base, rated at 12V and 21W/5W, and meets the ANSI standard for the US and Canadian markets.
The 1034 bulb shares the same BAY15d bayonet base and 12V, 21/5W dual-filament configuration as the 1157, and is classified as a variant of it. It is specified for the Chevrolet Bel Air from 1955 through 1963, making it the second most commonly listed bulb type in these specifications.
The 1154 bulb is specified for the Bel Air from 1950 through 1954. It also uses a BAY15d bayonet base and a dual-filament design, but is rated for both 6V and 12V operation, reflecting the electrical system voltages in use during that period. It is described as an older variant of the 1157.
The 1157NA and 1034NA bulbs are amber-glass variants of the 1157 and 1034, respectively. The 1157NA is specified for the 1974 model year, while the 1034NA is specified for 1975. Both retain the BAY15d bayonet base and 12V, 21W/5W ratings of their clear-glass counterparts.
Because the 1034, 1034NA, 1157, and 1157NA all share the BAY15d bayonet base and the same 12V, 21/5W or 21W/5W wattage ratings, they are physically interchangeable in terms of base fitment. However, substituting a clear-glass bulb for an NA-designated amber-glass bulb may affect the color output of the parking light assembly.
The 1154 bulb, while sharing the BAY15d base with the later bulb types, carries a dual voltage rating of 6V/12V rather than a fixed 12V rating. This distinction is relevant to fitment, as the 1154 is not a direct functional equivalent to the 1157 or 1034 in a strictly 12V system context.