changed the battery on my 2001 LS and it won't start

Welcome to the forum!

Can you provide more detail? Does the starter crank the engine over? Did you change the battery out because it wouldn't start? Did you make sure the battery polarity is correct? Did you make sure to remove any protective covers from the terminals of the new battery? Did you check the fuses? Do you get any power, such as dome lights? What happens when you turn the key to the Run position?

The more relevant detail you can provide, the better the suggestions we can provide.

-Rod

Rod, yes the starter cranks, battery would not charge, polarity is correct covers are gone fuses are fine dome lights windows radios etc works, car just wont start.

Starter engages does not fire. I think it might be the anti theft system we did everything in the owners manual any other Ideas?