The GMC S15 Jimmy high beam and low beam headlight bulbs both utilize the H6054 size. The replacement chart covers vehicle production spanning 1983 to 1991.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The H6054 is the sole headlight bulb size specified for the GMC S15 Jimmy across all listed model years, covering both high beam and low beam functions from 1983-1991.
The H6054 is a 5x7-inch rectangular sealed beam unit, meaning the lens, reflector, and filament are fused into a single assembly rather than a separate replaceable bulb within a housing.
When a filament fails in a sealed beam unit such as the H6054, the entire assembly requires replacement rather than an individual bulb.
The H6054 operates at 12 volts and conforms to ANSI standards recognized in both the United States and Canada.
Because the H6054 serves both the high beam and low beam positions on the GMC S15 Jimmy, the unit contains dual filaments within the same sealed assembly to produce each lighting mode.
The rectangular 5x7-inch form factor of the H6054 is a standardized size, which means compatible replacements from multiple manufacturers generally share the same physical housing geometry and electrical interface.