ScannerDanner: Troubleshooting a suspected bad ECM

In this video, ScannerDanner takes on a no start, no crank 2012 GMC Sierra. While not all going to plan, he shows the importance on how valuable testing for a 5V reference is.

Paul Danner (aka ScannerDanner) is an ASE L1-certified Master Technician with nearly 30 years of field experience in electronic, electrical, and driveability diagnostics. For over 20 years he has been employed as an instructor at Rosedale Technical College, where he has taught Engine Performance Diagnostics and Electrical and Electronic Systems troubleshooting.