GM Techs Keep Saying the SAME Thing About the Recall Fix — And the Feds Just Confirmed It

In April of 2025, General Motors recalled almost six hundred thousand trucks and SUVs over an engine that could tear itself apart without warning. The recall was supposed to close the case. For the engines that passed inspection, the repair was almost startlingly simple. A dealer drained the factory oil and poured in a thicker grade. But the failures kept coming, and the technicians turning the wrenches kept repeating the same quiet objection. Then, this year, federal safety regulators reopened the file. So what were the mechanics saying, and why did federal regulators end up asking the same question?