Where is the pcm located?

Why are you seeking it? You can't do anything to replace it without proper diagnostic tools on hand, and if you're looking for the PCM you certainly don't have the proper tools. Typically the processor is located on the firewall of the engine compartment with multiple large wiring connectors attached to it. Seek professional guidance. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops