Your best bets are:
* Online Parts Retailers: Sites like AutoZone, Advance Auto Parts, Napa Auto Parts, and RockAuto often have online diagrams and parts catalogs. Search their sites for your specific vehicle year, make, and model. While they might not be a full "exploded view" in the sense of a factory service manual, they will likely have detailed diagrams showing the component parts and their relationships.
* Online Repair Manuals: Websites like Haynes.com and Chilton.com sell digital or downloadable repair manuals. These often include exploded views and detailed diagrams. Check if they have a manual for your specific year and model of Corsica.
* eBay or Similar Sites: You might find a used factory service manual (FSM) or a Haynes/Chilton manual on eBay or similar online marketplaces. These often contain the level of detail you're looking for, but quality and condition can vary.
* Local Auto Parts Stores: While less likely to have the perfect diagram, a knowledgeable parts person at a local auto parts store *might* be able to access a parts catalog with sufficient detail.
Keep in mind that even a factory service manual might not have a single, giant exploded view of the entire steering column. Instead, it will likely show multiple detailed diagrams of sub-assemblies within the steering column.