I have a PCM I bought from an individual off of Facebook in a group..
He told me it was for an 05 GMC, but I can not get it to communicate with HP Tuners on either the viewer or editor...
It keeps giving me a detect protocol failed...
Did the guy sell me a junk PCM?
I have 3 other PCM's 2 from 01 Silverado's and 1 from an 01 suburban....
Any suggestions would be helpful. Thanks.