At a glance
What can fail
After heavy water exposure, the driver or passenger front airbag may deploy unexpectedly without a crash, potentially damaging the windshield and instrument panel, and causing minor injuries.
What the fix does
GM will notify owners about how water accumulation inside the vehicle can affect airbag system operation, matching guidance provided in 1998 and later model year owner's manuals.
Summarized — see the official notice for exact wording, dates, and contacts.