I recently bought a cable from AKMCABLES.com for a 1995 z28 Camaro. I then purchased a programming package from Bryan at PCMFORLESS.com. Today I went and tried to run the program and everytime it was trying to establish communications with the pcm I got an error that said, "Invalid Response From PCM." I was just wondering If anyone has any ideas on what this could be. I'm using a USB to Serial adapter, but I installed the drivers for it and my labtop recongizes the adapter on COM1. I'm hoping this isn't the problem because the stupid adapter was $30 from Best Buy, but who knows. Next, I tried to test my communications by using the DataMaster program I downloaded from the link AKMCABLES.com provided. After I setup the COM port I clicked "Test Com" and a message displayed saying something like this, "ALDL is working, but recieved undectable data. This PCM Type may not be recognized." I was just curious if anyone at all had any suggestions of what this could be; whether it's a problem with my PCM, my adapter, my cable or whatever else it could be. Please let me know if you have any thoughts. Thanks!