Chevrolet El Camino Radio Display Bulb Size

Additional Notes

• The Chevrolet El Camino radio display bulb specifications span model years 1959 through 1986, with six distinct bulb types appearing across that range: the 194, 73, 37, 1816, 1893, and 1891.
• The 1893 bulb is the most frequently specified type in these records, covering the El Camino from 1964 through 1970. It is a T5 miniature wedge bulb rated at 12V and 2W under the ANSI standard.
• The 194 bulb is the second most recurring type, fitted to the 1980-1983 and 1986 model years. It operates as a T10 miniature wedge bulb at 12V and 3.78W, making it the highest-wattage bulb among those listed.
• The 1891 bulb, specified for the 1959 and 1960 model years, shares the same T5 form factor and 12V/2W electrical rating as the 1893. Despite these similarities, the two carry different ANSI designations and are not confirmed as interchangeable in these specifications.
• The 37 and 1893 bulbs both occupy the T5 form factor, yet they differ in wattage. The 37 is rated at 1W while the 1893 draws 2W, a distinction relevant to fitment decisions.
• The 73 bulb, specified for the 1984-1985 Chevrolet El Camino, is a T5 miniature wedge type rated at 12V and 1.4W. Its wattage places it between the 37 (1W) and the 1893 (2W), though all three share the T5 designation.
• The 1816 bulb, used in the 1971-1973 model years, is the only T3.25 miniature wedge type in these specifications. At 12V and 4W, it is the highest-wattage bulb listed and occupies a physically distinct envelope size from the T5 and T10 types.
• The T5 designation appears across four different ANSI bulb numbers in these specifications: the 37, 73, 1893, and 1891. Shared envelope size alone does not establish interchangeability, as wattage and base configuration may differ.
• A gap exists in the listed model years between 1977 and 1980, and between 1960 and 1964, meaning no bulb data for those intervening years is present in these specifications.
• All six bulb types listed carry ANSI designations valid for both the United States and Canada, indicating standardized ratings applicable across both markets.