Hood Open warning message on electronic display. Showed up first around 2 months ago but then went away. Came back about a week ago and won't go away.

Truck is a 2013 Silverado 2500HD duramax 4x4

 

Look for the hood switch which should be in the hood latch assembly. You might have to replace the whole assembly. In most cases this will fix your problem.

 

Found on another site that the computer is looking for 2.1k ohms of resistance in order to enable the remote start. I bought a pack of 2.2k ohm resistors on Amazon for just over $5, soldered one in and it all works. Shocker! Solder in the resistor to connect the black wire and brown/green wire coming into connector prior to the latch switch (see pic). I used a few layers of shrink tubing and electrical tape to protect it from the elements and then tie-wrapped it up to keep it from flopping around. Beats replacing the whole latch assembly or waiting for the dealership to fix the problem either under warranty or for a few hundred bucks. Easy fix, good luck.