Just now, Crocodile said:

What am I doing wrong? Even when I upload the "absolute factory" file from you via DPS, it bricks the car. It's probably something simple. I press the "Program" button. Any settings perhaps?

 

I can almost bet it's a learn option.  Give me a few to go get the setup part.

Could my China clone MDI be faulty? Although I have used it for 5 years with SPS and GDS on countless cars without an issue.

Just now, Crocodile said:

Could my China clone MDI be faulty? Although I have used it for 5 years with SPS and GDS on countless cars without an issue.

No, you wouldn't have programmed successfully.  I'm convinced there's a learn procedure.  Just booting my stuff up to look.

1 minute ago, codebuilder said:

I can almost bet it's a learn option.  Give me a few to go get the setup part.

Let me try to do the BCM Learn with SPS, I have the VIN paid for anyway.

Just now, Crocodile said:

Let me try to do the BCM Learn with SPS, I have the VIN paid for anyway.

Actually, that's even better.  Saves me some time 🙂

10 minutes ago, codebuilder said:

I'm convinced there's a learn procedure. 

Yess! It worked! SPS BCM Learn unbricked the car, and the "park light on" went away.

Now I will install the HS file, then run another Learn.

Just now, Crocodile said:

Yess! It worked! SPS BCM Learn unbricked the car, and the "park light on" went away.

Now I will install the HS file, then run another Learn.

Yeah, that's what I worried.  We should try and build a T4 app so you can skip having to login to SPS haha.  Save's time but then again, how often will you do this?

OKay, HS file is in, this time it did not require the BCM Learn (strangely enough). HS buttons did not appear.
Can you get me the files to program the A11 Radio? I think that will do it!

Thanks a lot for guiding me through this.

Do you think we should try the HMI next instead?

So there is no separate K74 HMI on the Bolt, so A11 radio is what we need to try, I think.

17 minutes ago, Crocodile said:

So there is no separate K74 HMI on the Bolt, so A11 radio is what we need to try, I think.

I realized that after too :).  Just have to run out for a bit but can get you it after

Thank you @codebuilder, it is with your invaluable help, I have now solved this challenge.
A11 Radio and BCM both needed to be reprogrammed with their heated seat software versions. Then BCM Learn had to be performed separately, in order to unbrick the car. And then clear all DTCs afterwards to turn off the CEL.