Please help!!!!! I’ve exhausted my options. I’ve tried redoing all the grounds and terminals making sure I’ve got good connection to batteries and to ecm/pcm. Made sure tipm was clean and all plugged in. Truck was just running perfect 3 days ago. Go to start it, i got red flashing light beside Speedo and “check gauges light & trans temp light on.... someone please help, is the tipm toast?