Chevrolet El Camino Engine Compartment Light Bulb Size

Additional Notes

• The 1156 bulb is the most frequently specified engine compartment light bulb across the Chevrolet El Camino's production history, covering the 1965-1970, 1982-1986 model years, as well as 1980.
• The 1003 bulb is the second most common specification, used across the 1971-1979 model years.
• The bulb 93 is a lower-wattage variant of the 1156, rated at 13W versus the 1156's 21W, and both share the same BA15s single-contact bayonet base type.
• Despite sharing the same BA15s base, the 93 and 1156 are not directly interchangeable due to their differing wattage ratings; the Chevrolet El Camino (1981 and 1987) specifies the 93 where the lower 13W output is the intended specification.
• The 1003 bulb shares the same BA15s bayonet base and 12V, 21W electrical rating as the 1156, making their physical and electrical characteristics nearly identical.
• The 1959-1960 model years are the only entries specifying the 94 bulb, which is a dual-filament type with a BAY15d bayonet base, distinguishing it from all other bulbs listed in these specifications.
• The BAY15d base of the 94 bulb is physically offset from the BA15s base used by the 93, 1156, and 1003 bulbs, meaning the 94 is not interchangeable with any of the other three bulb types in these specifications.
• The 94 bulb is rated at 12V, 21/5W, reflecting its dual-filament design, and is noted as a variant of the 1157 bulb.
• All four bulb types listed are ANSI standards recognized in both the United States and Canada.
• The 1964 Chevrolet El Camino specifies the 93 bulb, placing it among only three model years across the entire production range that use this lower-wattage specification.