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I appreciate the assistance everyone. The Girlfriend had some family stuff come up so I've had to put the cobalt on the back burner for the last couple weeks. Unfortunately it will be a week or two until I can get back into figuring this out. Once I jump back in it I will definitely reach out to...

Just during the initial key on light check

The relay in that spot won't click at all. If I swap it to another spot (run/crank) it will click. That goes the same for the fuel pump relay. Bot of then share the same G101 ground and look to be on the same BUS path according to the diagrams. I think, and could be wrong, this is why I have...

I'm getting 12v here: And have a good ground through G101 at the top right

Correction, I found my receipt. Got mine from autozone for $165 with a military discount.

Just corroded. Unfortunately it didn't help my issues at all. Relay is getting power but no signal to turn on.

Got out of work early today. Here's to hoping I've found the problem...

Oreilly's had mine in stock. $180-ish

Appreciate the info. I'll see if I can locate something if I get time at work tonight.

Thanks to @Ross for the use of his AllData subscription! But, I'm officially stumped and need a sanity check. With power "on" the Powertrain relay should close and provide power to the Emission 10a, Injector/Ignition mod 10a, and ECM/PCM 15a fuses, correct? Because as of right now I'm jot...

I've found them using Google. Looking at the what I've found J1 pin 56 should be a ground and it has no continuity, so now I need to figure out where that wire runs.

Have continuity to ECU for power, but no power

Everything in the Fuse box, and OBD port is getting 12v. ECM still isn't talking to the OBD port. Currently working my way to from the Fuse box to the ECU checking grounds and power.... something just isn't adding up with it.

I've got power all the way to the alternator. So I believe that is good. Going to dig into it shortly... after I get back to the house

I'll have to check. I believe it was reading correctly. And that's the odd thing, when it ran the other day I had no issues. OBD port worked, car drove fine, no issues at all... until the battery died from the alternator not charging. They are all screwed in. I'm guessing that everything is...

So I had the car running, found out the alternator was dead. Yesterday changed the alternator and put in a junkyard lower fuse box to hold the fuse panel and ECU (mine was missing)... now it won't crank. Key in "on" position and everything comes on (stereo, horn, blinkers, etc). But the car...

Cobalt is alive!!! It needs a tensioner pulley though She will now be my daily driver until I can get my "brick" on the road in the next couple weeks.

Got the motor mostly back together. Hoping to have it running tomorrow. New valves are in, timing is set and turns over by hand with no issues: Now shows a little compression when turning over by hand: Tomorrow will be putting the radiator back in, plumb the coolant lines and vacuum hoses...

416!! That's me! :eek:

Doesn't show any signs of guide damage. Plus what I thought where gouges in the pistons turned out to be no more than gunk moved around with a very tiny impression on the #3 piston