I have a 08 GMC duramax LMM. I just installed the EFI live. We were sent a new ECM because the software messed mine up some how and the truck wouldnt start. So they sent use one already with the tune installed and ready to go. I was very impressed with the difference but after driving it im having issues with the service brake system with abs light and parking brake on with chime. If i turn truck off it takes about thirty seconds and its back on. I cleared the codes but after a 30 mins of driving the lights were back on. The codes start with ECM and one is 2690. What could my problem be and how can i fix it. Truck has stage 3 AFE intake and 4in to 5 inch after cab exhaust with no dpf. Had Banks 6 gun stacked with quadzilla before i changed to EFI. PLEASE HELP!!!!!