Help! 97 LSS will not run.

I posted early and have made some progress but not much. The LSS is still not running. When the key is turned the engine will spin but will not start. I am getting spark at the plugs and there is fuel at the cylinders. The battery is good and so is the starter. No problems with the catalytic converter. The car over heated and that is when the problems started. I have drained the oil and it did not have water in it. I have also filled with oil and filled the coolant reservoir and radiator. Plenty of fuel in the tank. Any ideas on what I need to do? Any ideas are greatly apprciated.

Did you try spray carb cleaner into the intake for a quick start, fuel to the cylinders, checked how?

If you overheated your engine, you probably needed to flush your system instead of just draining and re-filling.

Is the ECM tripping any trouble codes?

i had a similar problem and found out it was my security line. i had a locksmith remove the whloe system its worth a try only coast me $50. do u notice when u turn the key to on position the seurity light flashes and the fuel gauge goes way over full if so, thats ur problem