Was driving down road and truck quit.

I replaced the fuel pump because it didn't sound like it was working. I replaced it in the spring so I thought I had a bad one. Not the problem. Checked for spark at #1 by pulling plug and grounding on manifold while my wife turned it over. It didn't spark. I took the coil and ICM to Autozone to have them check them and they said they were good. Any suggestions? I understand that the crank position sensor could be the culprit. Where is it located please? Thank you, Jack