The Chevy Silverado is a workhouse of a pickup truck. The 2500HD and 3500HD models are made for towing heavy loads. The Chevy Silverado 1500 is the more passenger friendly version that benefited from a redesign in 2007. Luckily, the electrical systems of all Silverados hit more than they miss. Still, it pays to know where to look if you do experience electrical problems.
Expect the more common electrical system problem to affect the lights. When interior lights start flickering or just don’t want to work at all, your first step is to check fuses and relays. If that checks out, look for a loose wire connector. Don’t forget to check the ignition switch too.
Examine the ground cable from the engine to the firewall, particularly if you’re experiencing more than one electrical problem. Connections particularly come loose around the firewall.