Tom Petty Heartbreaker!

ROCKER Tom Petty died at age 66 — but he could have been saved — if he’d listened to family and friends alarmed by his dangerous condition!

Sources tell GLOBE the Florida-born star, who died in the hospital a day after collapsing from a heart attack at his home on Oct. 1, had been “too frail” and worked himself “too hard” during his last tour.

“Tom hadn’t been doing well for a while, and when they got back from London in May, he seemed to be on his last legs,” says a longtime friend.

Alarmed by his poor health, friends and family tried to get Tom help, insiders say — but the hard-headed I Won’t Back Down crooner refused to heed their advice.

“People tried to tell Tom to slow down but he wouldn’t hear of it,” says a source close to the American Girl singer. “He pushed himself beyond the limit because no one could tell him what to do!