Intermittent No Crank - RESOLVED

[Shall36]

Hi all, thought I would post this in the event someone else has a similar problem. 

 

2015 Sierra 6.0. 40k miles. 

 

Truck would not crank when the key was turned. Screens would go blank and nothing. If I tried enough times, I could get it to start. Took it to the dealer, was able to replicate the issue, and dealer diagnosed the truck with a bad ECM.  Tech said normally, it’s the junction block on the battery or even a bad starter. 

 

ECM replaced and all is good. Covered under warranty. 

[crankman]

Cool thanks for the tip

[Black02Silverado]

Glad it was a fast easy fix.