The Cadillac Allante high beam and low beam headlight bulbs both utilize a 9004 size. The replacement chart covers vehicle production spanning 1987 to 1993.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Cadillac Allante uses the 9004 bulb across all model years covered by these specifications, spanning 1987-1993, for both the high beam and low beam headlight positions.
The 9004 is a dual-filament halogen bulb, meaning a single bulb contains two separate filaments that serve both the high beam and low beam functions within one housing.
The 9004 operates on a 12-volt electrical system and carries a wattage rating of 65W on the high beam filament and 45W on the low beam filament, reflecting the greater light output demanded of the high beam.
The 9004 uses a P29t base, which is a specific connector type that determines physical and electrical compatibility with the vehicle's headlight socket.
The 9004 conforms to ANSI standards and is recognized in both the United States and Canada, placing it within a regulated specification framework for automotive lighting.
Because the Cadillac Allante uses the same 9004 bulb for both the high beam and low beam positions, a single bulb type serves the entire headlight system on this vehicle.