The Oldsmobile Cutlass Supreme 1991-1993 has 4,000 documented key codes in the range 0J00-9J99, 0K00-9K99, 0L00-9L99, 0M00-9M99. Uses a 6-cut single-sided profile. Set the duplicator to flat-bottom cuts 0.1″ wide. Code is typically stamped on the original key bow or available via the VIN through the dealer. Bitting data verified as of May 9, 2026.
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