A 68-year-old Burke County man apparently suffered a heart attack and died after a wreck on Interstate 20 in McDuffie County on Friday.
Trooper Patrick Prosser, of the Georgia State Patrol post in Grovetown, identified him as Charlie Key Boyd, of the 2500 block of Pine Needle Road, Hephzibah.
Workers from McDuffie County Emergency Medical Services performed CPR in an effort to save Mr. Boyd's life, the trooper said.
Mr. Boyd was pronounced dead at the emergency room of McDuffie Regional Medical Center in Thomson.
Mr. Boyd's 10-year-old grandson was inside the Chevrolet S-10 pickup that was being driven by Mr. Boyd westbound near mile marker 168 about 1:15 p.m.
The youngster saw his grandfather experiencing a medical problem and tried to wake him up at the wheel before the truck sideswiped a cable barrier in the median of the busy highway, Trooper Prosser said.
After the accident, the boy, who was not injured, got out of the truck and ran for help.
A motorist, identified as Randy Headley, of Columbia, stopped and assisted the boy by calling authorities for help.
Helping in the investigation was Trooper Willie Ramsey.
Deputy Henry Campbell of the McDuffie County Sheriff's Office, assisted troopers by directing motorists around the scene of the accident.
The youngster was later taken by a trooper to be comforted by his mother.
Mr. Boyd, who was handicapped, was retired from the Army.