Filter Filters Alero Harmony Audio Remove All Filters Price Under $50 (2) Condition New (2) Make Oldsmobile (2) Oldsmobile Alero 1999-2000 Factory Stereo to Aftermarket Radio Harness Adapter $5.95 Oldsmobile Alero 1999-2004 Factory Stereo to Aftermarket Radio Antenna Adapter $5.95