The GMC Typhoon high beam and low beam headlight bulbs both utilize the H6054 size. The replacement chart covers 1992 to 1993 model 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 H6054 is a 5x7-inch rectangular sealed beam unit built to ANSI standards recognized in both the United States and Canada. It operates at 12 volts.
Unlike halogen or HID bulb types, the H6054 is not a replaceable bulb in the conventional sense. When the light fails, the entire sealed beam unit is replaced rather than an internal filament or capsule.
The GMC Typhoon uses the H6054 for both high beam and low beam headlight positions across the 1992-1993 model years, meaning a single bulb type serves all four headlight functions on the vehicle.
Because the high beam and low beam positions share the same H6054 specification, the sealed beam units are interchangeable between those positions on this vehicle.