For the 2001 Oldsmobile Alero the Yakima SuperJoe Pro 2 Bike Rack Y02629 is a confirmed fit for the 2-door version according to Yakima. However, since your car has rear spoiler there is a better option from Hollywood Racks.
Their Over-the-Top 2 Bike Carrier # HRF2 features a spoiler-friendly design that will place no stress on your trunk-mounted spoiler. This rack has a special frame design that avoids contact with the spoiler by extending up and over it. The two linked videos will show... view full answer...
Since your 2002 Olds Alero has a rear spoiler I recommend the Hollywood Racks Over-the-Top rack # HRF2. This rack has an additional upper arm piece that moves the top straps up and over that spoiler so no weight is put on it (since the spoiler is not meant to support weight). I have included a link to a video that shows how it works.
If you will be carrying any bikes that do not have a top frame bar that goes straight across (like a typical men's bike would) then I recommend using bike... view full answer...
The Thule passage, # TH910XT, is listed as a fit for your 2003 Oldsmobile Alero.
If you will be carrying womens, childrens, or alternative frame bikes, I recommend using the Bike Adapter Bar, # TH982XT, to carry the bikes more level. I have included a link to a video demonstrating how the adapter works. view full answer...