Chevrolet Suburban Electrical Shut Down

After Driving For A While (around 30 Minutes), Gauges Went Off And Return To Work, And After Stopping The Car The Central Lock Didi Not Work...

While Driving Lost All Electricity And Brakes?

My Car Can Be Driving Just Fine And On The Highway Or Local Street, The Entire Electrical; System Just Dies, The Engine, Lights, Dash, Etc...

Vehicle Has No Electrical Power No Dash Or Accessory Lights. Won't Start, Starter Wont Click, Anything. Tried Jumping, No Change. So...