The Eagle Summit front and rear side marker bulb size is 168 for this vehicle model. The replacement chart covers 1989 to 1992 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 168 bulb is the sole bulb size specified for the Eagle Summit across all listed side marker positions and model years.
The 168 bulb follows the ANSI standard recognized in both the United States and Canada, classifying it as a standardized automotive lamp type.
It is a miniature wedge bulb, designated by the T10 form factor. The wedge base design means the bulb is held in place by the socket itself rather than by metal pins or a bayonet mechanism.
The 168 operates at 12 volts and draws 4.9 watts, placing it in the low-wattage range typical of marker and clearance lighting applications.
The Eagle Summit uses the 168 bulb in both the front and rear side marker positions for the 1989-1992 model years, indicating a uniform fitment across all four positions on the vehicle.
Because the front and rear side marker sockets share the same bulb size, a single bulb type services all side marker positions on the Eagle Summit within the specified model year range.
The T10 wedge format is a widely produced bulb type, and the 168 designation specifically identifies a variant within that family. Not all T10 bulbs carry identical wattage ratings, so the 4.9W specification is a relevant fitment detail rather than a universal T10 characteristic.