Have you figured out what the solution was? I'm having the same problem now and can't get my car inspected. The dealership can communicate with the computer but everyone else I bring the car to can't get their scanning tools to communicate with the computer. Back in February I had to get the computer reprogrammed because I had to replace the fuel injectors and ever since then, no one else can communicate with the computer except for a GM dealership. I'm thinking the reprogramming has something to do with no one else being able to communicate with the computer but the dealership just tells me that if they can communicate with it then anybody should be able to. They told me to bring it to another inspection station because the one I brought it to may be using faulty equipment. So far, I've brought the car to 2 different inspection stations, 3 mechanics, Autozone, and Advanced Auto and none of them can communicate with the computer. So I'm sure that not every single person i brought it to is using faulty equipment like the dealership is trying to tell me.