Who can offer paid service to put DPS and do a module flash of E41 to recover a module that was flashed by HP tuners and now is communicating but does not run and  won't take SPS, EFI Live or HP tuner flash due to x37 response timeout 

if SPS won't work , i think DPS doesn't help too.

2 hours ago, bajad said:

if SPS won't work , i think DPS doesn't help too.

I'm pretty sure CDC is talking about the DSP map switching on those E41's that the tuning companies offer.

27 minutes ago, BLKATSG said:

I'm pretty sure CDC is talking about the DSP map switching on those E41's that the tuning companies offer.

No not talking about DSP switching, referring to using DPS to do it on the bench, have been told/read on forums that other with the same issue has taken ecm on bench and pinout and DPS will recover it as the ecm is still online and communicating but with the calibration data messed up so DPS does a full boot flash and recovers the ecm so we can calibration flash it again

Is the ecm a updated , new from HPTuners , or unlock by Avtokomander ?
If it's a old hptuners mod ecm , possible that the seed/key is now not compatible with the GM algo anymore

I have many times made E41 ecm not responsive after downloading test file , disconnection during download and so on
so all E41 were revived by using DPS, and the right file for for it
If you have DPS and know how to use it , let me know your VIN and ecm p/n , I'll make a file for try

Do you have Avtokomander? I was able to recover one of these with it when the other tools wouldn't work.