When we pre-program a T87a with Tis2web and send it to HPTuners for unlock there is not an issue reading and programming the car. I was told from HPTuners we can send in new unprogrammed TCM's for unlock service without an issue. We sent in 3 TCM's and attempted to install in three separate cars without success.
I followed the following process:
1) Connect VCM Scanner to the vehicle with the stock TCM installed
a. Go to ?Vehicle Controls & Special Functions?
b. Click ?Replace TCM? to start the function (located under System -> General)
c. Follow the prompts to complete the Replace TCM process for the stock TCM
2) When prompted, replace the stock TCM with the HP Tuners unlocked one
3) Connect VCM Scanner to the vehicle with the unlocked TCM installed
a. Go to ?Vehicle Controls & Special Functions?
b. Click ?Replace TCM? to start the function (located under System -> General)
c. Follow the prompts to complete the Replace TCM process for the unlocked TCM
After that I attempt to reprogram with Tis2web and it fails to program with error E4491 and E4423 (attached). HPTuners has told me it is a GM issue and they cannot support it, not sure what process others are doing, might have to end up eating some modules but want to be able to have something on the shelf to install/program without having to wait.
VCMSuiteInfo OEM TCM.txt
VCMSuiteInfo Unlocked TCM.txt