I have a 2007.5 2500HD (new body) GMC Duramax 6.6L, Allison 1000. I previously had an issue blowing the 2 amp Theft Deterent fuse. I subsequently had the Theft Deterent Control Module replaced back in Feb 2020. This issue started again a few days ago and truck wouldn’t start unless I replaced the 2 amp fuse (theft deterent alarm icon on dash was lit up). Got it to the dealership and they are having a hek of a time troubleshooting to determine what is causing this no start issue. No codes are being displayed on their computer. All wiring was checked and everything appears ok. They thought it was the fuse box so put a new one in but that was not the problem. They are thinking about replacing the ECM. Anybody got any advice?