1970 GMC Custom won't start?
Standard 1970 GMC Custom Camper Pickup.
When turning the key, I get the "BRAKE" light to come on (normally does) and a single metal clink.
Normally, that means the battery is nearly dead.
Checked
One of three things. It's either the solenoid, starter, both, or if the truck has ac the compressor is locked up. Try going under the truck with a screwdriver and manually tripping the solenoid. If it does the same thing the starter needs to be replaced.
