yep, corrosion in connectors will do it for sure.
usually when you replace the main components and that doesn't work then you go to the troubleshooting wiring and power path's.
the thing about corrision is once it's in there it's hard to get rid of it unless you replace all the terminals with new ones. If this tech did not do that then the problem will more than likely return one day.

I called a forklift mechanic $165 an hour, after 2 hours cleaning corroded wire connectors he got power to the coil. Then another 1.5 hours of Cleaning more corroded wire connectors he got power to distributor and it fired up. Previously I installed new Ignition module, Distributor cap, Rotor, Coil and coil wire and a new fuse.
Mechanic said Ultimately it was the badly corroded wiring connectors.
Although the Cap and Rotor were Horribly wore away and corroded the worst I had seen.

Thanks for your help.

Thank you, I need some time to check it out.

Thank you, I need some time to check this.

since your talking cap and rotor i will assume this is the GM vortec V6?
you might want to check the oil pressure switch also, these will also kill the ignition if the switch is bad. just use a vom, put in ohms and read across the switch, crank the engine and it should close, if not then replace the switch.
most of the time you will see evidence of it leaking as well, sometimes they don't but always check that switch, it only takes a couple minutes and is an easy check and fix.

Make sure you have battery voltage to coil if so remove cap there is a pick up coil inside check ohms the two wires it should be about 500 to 1500 ohms if OK than change the ingion modual in the distubuter. Good luck.