ok so when I upgraded my radio this shop said that there was no harness to hold the radio made for my year grand prix so he used a diffrent harness and cut into the plastic above the radio to make is fit. Well it kept falling out so went to buy a harness for the grand prix and yeah i found it but now i have this gap between the harness and the plastic trim piece. So i looked around ebay and every seller say that the DIC has the miles in it. I have like 50000 miles in my car I dont want to but someting that has 100k+ to void my warranty. But is it really true that the DIC holds that information or would I have to get it reprogrammed as the sellers say?![]()