The dash indicators are all listed in the Owner's Guide. Go to the Tech Articles section (see the header menu at the top of this page) and look at the Owner's Guide for your year of LS (if you have an '00, look a the '01 Guide; for '05-'06, look a the '04 Guide).
You'll probably need to go to AutoZone/etc to get the codes read before we can help you, but you need to check the Owner's Guide first to see which indicator is lit.