Chevrolet Metro front turn signal bulbs utilize 1034NA or 1157NA sizes, while rear turn signal bulbs require 1156 size. The replacement chart covers 1998 through 2001 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 1034NA bulb is a dual-filament type rated at 12V and 21/5W, fitted with a BAY15d bayonet base and natural amber glass. It conforms to ANSI standards applicable in both the United States and Canada.
The 1034NA is a variant of the 1157 bulb. Despite this relationship, the two are not interchangeable across all model years of the Chevrolet Metro, as the 1999 front turn signal position uses the 1157NA rather than the 1034NA.
The 1157NA shares the same BAY15d bayonet base, dual-filament design, 12V rating, and 21W/5W output as the 1034NA, and also carries natural amber glass. It is the specified front turn signal bulb for the 1999 Chevrolet Metro.
The 1156 is a single-filament bulb rated at 12V and 21W, fitted with a BA15s bayonet base. It conforms to ANSI standards for the United States and Canada.
Because the 1156 uses a BA15s base and the 1034NA and 1157NA use a BAY15d base, these bulb types are not physically interchangeable despite sharing a similar voltage rating.
The rear turn signal position on the Chevrolet Metro uses the 1156 bulb across all four model years covered, spanning 1998-2001.
The front turn signal position uses the 1034NA for the 1998, 2000, and 2001 model years, while the 1999 model year is the sole exception, requiring the 1157NA instead.