2005 Chevy Astro 4.3L - Int No Start.

[UsedTireShop]

We are stumped on this one. This van was limped to us by the customer who tried to fix it himself. Truck was skipping and barely running.
We shimmed the new crank sensor. Reset the distributor (it was off 2 teeth). We repaired the common ground issue this vehicle has. Changed the dist. cap and rotor with Eclin parts.
Truck ran great for one day. Day 2 it was limped back to our shop. We found that we had to cycle the key to get the fuel pressure up. We replaced the clogged fuel filter. Truck still wouldn't start because of no spark.
We changed the ignition module and the truck started and ran fine for a little bit. The tech noticed that the voltage gauge was pinned in the red. We assume the high voltage cooked the module.
Any ideas would be greatly appreciated.

[cleenyc99]

I'm guessing it doesn't start again, correct? I would say check the pins on the ICM connector. check for burnt or spread pins. if that checks out voltage drop the power and ground. If that checks out then look at the coil. The white/blk wire is the control (out put from the ICM) check for a switching on/off ground signal. The pink wire at the coil is battery voltage. voltage drop this wire. if this checked out and you have no spark then it's the coil. you should have found your problem by this point. hope It helps

As far as the voltage gauge what is the actual battery voltage with vehicle off and with vehicle running. using a volt meter?