Put another iginition switch in a 2002 Chevrolet Malibu but nothing comes on. Wont crank. Nothing lights up

Did you check the fuses under the hood to see if anything is blown? If all seems good there, it will take hands on testing of all related starting circuits to find out what is going on. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops