2007 Chevrolet Silverado 1500 Classic, 5.3L engine, 230k miles. A couple of nights ago, I got a call at midnight from my son who said the truck was completely dead, no lights, no noise, no response of any kind. I got up and was just about dressed when he called back to say the truck juut came back to life and started fine.
I was out today and it did it again. No electrical at all. The only non electrical thing I noticed was when I stepped on the brake before starting, the brake pedal was rock solid, like it had been welded in place. It is not a requirement to step on the brakes to start it but that is just a habit.
I opened the hood, pulled the relay/fuse panel cover and lightly tapped on all the relays and then shook the battery cables and then jumped in and it started right up. I got home and checked the Silverado/Sierra forum and found a few others had the same issue. Some immediately called a tow truck and spent lots of $$$ but the problem returned. Others shook the battery cables and drove home. The issue returned but each time, shaking the cables solved it for the time being.
I and one other noticed that the negative battery cable was loose. I pulled both battery cables to inspect them, no corrosion, mine has a new battery and then reinstalled the cables, making sure both were tight this time.
Just wondering if anyone else has experienced this and if the loose negative battery cable (not that loose BTW, but enough that it could be tightened with just a little torque. I guess it was about finger tight to begin with.