Here is the bin I pulled from the 07 P12b I have. It is indeed 2MB.

It also took a lot longer to read due to failures - wondering if the resistor trick would help. I'm surprised at how unstable the P12b read was compared to the P12 I have.

Yep! I was able to reproduce exactly that by building locally and debugging. Stepping through line by line I got a success response from the kernel and was able to write! Now I have 2 happy P12 pcms

I'm still willing to test that fix to confirm - hopefully it'll help others!

No luck with the bench harness. I did pick up another computer while I was at the junkyard - I'll try to be more careful with this one! It's an 07 which I believe are 2MB? Anyways - while I have this bricked one I'm more than happy to use it as a test bed for any PCM hammer features. Can't break it ...

Voltage is 12 or so volts when on battery, 13 when on the battery charger. I'm going to the junkyard to get connectors to build a bench harness to remove any unknown variables tomorrow. I have an ac adapter that I know works for P01's and has done P01 flashes multiple times on multiple computers. Fe...

I've got a P12 that is soft bricked (?). The PCM is from an 06 trailblazer OS number 12606400 Using PCM hammer 021 I grabbed a bin successfully from my computer. I'm not using a bench harness but the computer is the only module on the bus. I made a calibration change and attempted to write calibrati...