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.
This bulletin involves 2015-2017 Cadillac ATS, SRX, CTS, CT6 and XTS vehicles. A snapping or ticking noise at the harmonic balancer may be heard, or sparks may be observed at the balancer.
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