The Oldsmobile Cutlass Supreme 1988-1990 has 8,000 documented key codes in the range 00A0-99A9, 00B0-99B9, 00C0-99C9, 00D0-99D9, 00N0-99N9, 00P0-99P9, 00S0-99S9, 00U0-99U9. 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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