The Autocar AT uses a 97 bulb size for both front and rear side marker applications. The replacement chart covers 1983 to 1988 model years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Autocar AT uses the 97 bulb for both front and rear side marker positions across the 1983-1988 model years.
The 97 is an ANSI-standardized bulb recognized in both the United States and Canada, operating at 12 volts with a 13-watt output.
It uses a BA15s bayonet base, which is a single-contact base type that locks into its socket with a twist-and-push motion.
The 97 is a single-filament bulb, meaning it serves one lighting function rather than switching between two brightness levels.
The 97 is a variant of the more widely known 1156 bulb, though the two are not necessarily interchangeable despite sharing the same base type, as wattage and voltage ratings can differ between variants.
Because the same bulb size applies to all six model years across both the front and rear side marker positions, a single bulb type covers the full scope of side marker fitment for the Autocar AT in this specification range.