Alero — N-body (1999–2004) → 2001–2003 ✓ Factory-verified internal ⛭ GM factory document — 2001 oldsmobile alero rpo code list, p.1. ⛭ GM factory document — 2002 oldsmobile alero rpo code list, p.1. ⛭ GM factory document — 2003 oldsmobile alero rpo code list, p.1.