General Motors has updated service bulletin PIP6101, which addresses an engine ticking noise caused by a manufacturing defect. The revised version, PIP6101A, now includes more 2025–2026 models ...
Why ticking happens: Ticking occurs when a lifter cannot maintain zero lash due to wear, sludge, or poor oil flow, creating a rhythmic tap that follows engine RPM. High‑risk engines: Engines like ...
A ticking sound under the hood is investigated, covering common causes like valve train noise, lifters, and engine issues ...