Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
2014 Chevy express 4500 6.0 L96 6L90 no communication with pcm and the “service air bag” on display along with no check engine light when you turn the key on. Also ABS, air bag, and brake light are on. I’ve Checked every fuse and have been messing with this thing for the last 2 days please help!!! Checked OHMS between pins on DLC. And only 1v on each pin