2008 Silverado 1500 locks not working?

[msouthard]

Hi,

I have a 2008 silverado 1500. When I press the unlock/lock button on the key fob, the lights blink and horn honks like it is supposed to. I can hear a click where the fuse box inside the car is located, so all fuses work. I was told if one side of the truck has an issue, both sides will fault. When I am inside the truck the locks dont work either so I can't determine what the issue is. I'm thinking it might be a switch inside the door panel, but it could be the actual locks themselves not working. I would hate to buy a switch then it not be the issue. Anyone  experience this, or have advice?

 

Thanks