2002 Chevy Avalanche stalls

Drove to a friends about 2 miles, sitting indriveway, engine stalls, restarted, 10 seconds later stalls again, get it started again, pull out of driveway, stalls again, instrument gauges going wacky. Shut it off, raise hood, notice small ground wire to firewall broken off and larger ground wire corroded. Shake the wire a little, restart truck and drove it home where it sits now. I'm assuming it's electrical but not positive.