My 2003 Saturn Ion won't start

Is the engine cranking? The job of the battery is to power the starter so if its not cranking that is the first place to look. If the battery is ok then you need to start with basics like fuel pressure and spark. Alex

You can use a cheap spark tester like this one. Many auto parts stores have this in stock. https://www.lowes.com/pd/KD-Tools-Automotive-Ignition-Tester/50190647?cm_mmc=SCE_PLA_ONLY-_-ToolsAndHardware-_-SosHandTools-_-50190647:KD_Tools&CAWELAID=&kpid=50190647&CAGPSPN=pla&k_clickID=391f7ab5-1dbe-4862-8eb9-1100054ad744&gclid=CjwKCAiA9rjRBRAeEiwA2SV4ZSAJpy1C8J1u77lLEtJhV3jBDFdmOLAfDZ9SvWPgLlTFZR5icJoqLRoCUGoQAvD_BwE