Some 2015-2017 Lincoln Navigator vehicles equipped with a 3.5L EcoBoost engine with greater than 20,000 miles may exhibit a tick type noise from the cylinder block area. This noise may be caused by a cracked piston skirt.
This bulletin applies to 2015-2017 Buick LaCrosse and Enclave vehicles. Some customers may comment on a snapping or ticking noise and/or sparks in the engine compartment.
Some owners of 2016-2019 Cadillac ATS and 2014-2019 CTS Sedan vehicles equipped with a 3.6L engine may comment about a brief rattle or ticking noise that is heard when revving the engine in Park/Neutral.
This bulletin applies to 2014-2019 Chevy Corvettes equipped with a 6.2L LT1, LT4 or LT5 engine, regarding a concern of engine thermostat tick noise and/or running hot.
This bulletin applies to 2005-2008 Nissan Frontier models equipped with the QR25DE engine, and built before July 12, 2006. The issue may involve a ticking noise that sounds like spark knock, when accelerating 1/8 to 1/2 throttle opening.
This bulletin applies to 2014 BMW 328i xDrive vehicles. Some owners may complain about a high-frequency ticking noise from the engine bay.
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