Hello, I have a 2006 Silverado 2500HD.

The other day when I got in the truck and went to drive it, it barely started. But when it did start my gauge cluster wasn’t working at all & for some reason my backup camera was pulled up on my radio’s screen.

After I drove it for a bit and turned off and back on again the speedometer started working but everything in the gauge cluster still wasn’t. Any ideas?

 

Probably a bad ground. There are a 1 or 2 grounds hidden by the dash that could easily be an issue, or one of the many in the engine bay.