Will your LS run?
Check the fuel cut off switch in the driver kick panel, see if you need to reset the red button.
Disconnect the negative battery terminal for about 1/2 hour to reset the CEL.
Try a different ignition key maybe you lost the key program.
The owners manual talk about: Large metallic objects, electronic devices that are used to purchase gasoline or similar items, or a second coded key on the same key chain may cause vehicle starting issues. You need to prevent these objects from touching the coded key while starting the engine. These objects will not cause damage to the coded key, but may cause a momentary issue if they are too close to the key when starting the
engine. If a problem occurs, turn the ignition to the 2 (OFF) position,
remove all objects on the key chain away from the coded key and restart the engine.
