Lifter and camshaft failure
ENGINE
39 NHTSA complaints · 2020-11 → 2026-07
“This is from dealership “found customers concern of engine light is on and ticking noise found cylinder 4 lifters to be collapsed causing the exhaust gasses to be trapped in the cylinder causing the cylinder wall to dry out and leaving scratches on the cylinder wall recommend…”
“While I was driving home from the grocery store with my 4 kids our 2021 GMC Yukon XL (5.3L V8 engine), the vehicle suffered a sudden, catastrophic mechanical engine failure without warning. The engine began violently shaking, lost major propulsion…”
“The contact owns a 2021 GMC Yukon XL. The contact stated that while driving at an undisclosed speed, there was an abnormally loud sound coming from the engine compartment. The contact stated that the vehicle lost motive power, prompting the contact to pull over to the shoulder…”

