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Discussion Starter #1 (Edited)
In desperate need for a replacement ECM for my sweet 2005- part I need is 192 10 071. It is at the Chevy dealer now, and they say none are available at any of their sources. Hoping one of you has one for sale or can refer me somewhere I can buy one.
Appreciate any help I can get,
Thanks,
Ande in Elburn, IL
[email protected]
630-391-1399
 

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Discussion Starter #3
Thanks for the tip. Unfortunately, they did not have one. The problem is that the car starts, runs about 40 sec, then shuts off. The dealer has checked everything possible, and says this is what is wrong. They exhausted their suppliers and just about everything on the internet and could not find one. Every site says they have it, but you click to order, and it says out of stock.
 

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Thanks for the tip. Unfortunately, they did not have one. The problem is that the car starts, runs about 40 sec, then shuts off. The dealer has checked everything possible, and says this is what is wrong. They exhausted their suppliers and just about everything on the internet and could not find one. Every site says they have it, but you click to order, and it says out of stock.
Have you had the fuse box under the hood checked for the more common broken wire? Might be best to get a jumper wire to test before investing in an ECM.

https://www.ssrfanatic.com/forum/f5/main-engine-fuse-box-problem-pictures-64022/#post1164625

https://www.ssrfanatic.com/forum/f5/underhood-fuse-box-jumper-last-10-a-146538/
 

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Have you had the fuse box under the hood checked for the more common broken wire? Might be best to get a jumper wire to test before investing in an ECM.

https://www.ssrfanatic.com/forum/f5/main-engine-fuse-box-problem-pictures-64022/#post1164625

https://www.ssrfanatic.com/forum/f5/underhood-fuse-box-jumper-last-10-a-146538/
I absolute agree! 05 does have fuse box problem, broken wire, done many, many fuse boxes. Starts/runs a while, quit!!

Go to SSR How to Library: look up FUSE BOX REPAIR

https://onedrive.live.com/?id=3EF39D9F5ADCE5E5!853&cid=3EF39D9F5ADCE5E5

Dicktator
 

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I agree with @ROPE EDIT and @Dicktator (I was typing while he posted his response) it is very possible that it is a fuse box problem. Provided that they are still able to communicate with the ECM when the problem occurs.

The wire in the fuse box that breaks is used by the ECM to ground (turn on) the Powertrain relay. When the problem occurs the relay would shut off (open) which would shut off power to a number of fuses (ignition coils and Injectors!) also one of these fuses provides power to the ECM. The ECM uses this current to operate some of its low current actuators, that is why this fuse is 20 amp. You will notice that the other fuses to the ECM are 10 amp. They are used to turn ECM on and provide input regarding the ignition switch position. They may have found that the circuits are shutting down, but they are assuming the computer itself is shutting them down not faulty wiring.

Referring to picture #1 -- (thanks to ED in Fla)
You can test to see if it is the causing the issue by monitoring the voltage at any one of the fuses that the relay supplies power to: 29,33,34 or 36. IF the voltage drops to 0 volts at any fuse (actually it would be all of them)when the truck stalls (or while cranking and it won't restart) this would confirm the relay is shutting off. more testing required - keep reading.

The previous test alone does not completely confirm a broken wire - it is possible that the ECM could be shutting off the ground to the relay.

This can be tested by backprobing the connector (you must backprobe because the connector MUST BE plugged in!) at terminal D1 Black wire with white tracer. See Picture #2 for reference. You should read close to 0 volts (less than about .3) when engine is running (if you read dead nut 0 you have a bad connection should also read near 12v key on engine off). Monitor what happens to the voltage when the engine shuts down (or while cranking and won't start). If it drops lower, reads dead nut 0 (or less than about .001 depending on meter sensitivity) you have confirmed that the problem is the relay or a broken wire in the fuse box.
If it goes to 12v when engine stalls (or while cranking/no start) the ECM is not commanding the relay on for some reason. Possible the ECM is faulty!

This is a test procedure that I would use to verify the problem before purchasing an ECM or taking apart/sending out a fuse box for repair.

I hope this helps but more than that I hope that they actually checked this first.
 

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