Hey fellows, I dont live too close to any Hummer dealer so I used the local GM guys so I do not know if it made a difference. My 06 H3 with 28000 miles was idling very rough sporadically. I took it to them and picked it up yesterday, he said they found a fault and fixed it. Then he said if that does not do it to bring it back. Here is what ther receipt said: "Inspect and found PCM software calibration update, software code 10D9B. Reprogrammed PCM with latest software update to correct. Code: J6354 PQ 10D9B. Was there any previous posts of fault codes or does anyone have an idea on what this code is?Also what brand upgrade would you all suggest if any? Thank you in advance for any and all help, Gunz

 

i believe the numbers on the invoice are referencing the code for the updated flash and not a PCM/BCM code. GM has numbers for these so when programing you can see what version is currently in the computer.

 

Thank you H3 Alpha. I just noticed loggin in there is a seperate section for this on the board also so I will jump on there to check. Thanks again,M