Diagnostics

OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring System. If a diagnostics check is needed between e-mails, push Advisor can run a check., and an Advisor can run a check.

    See also:

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    This section is only for people of adult size. There are special things to know about safety belts and children. And there are different rules for smaller children and infants. If a child wil ...

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    If the On Indicator is Lit for a Child Restraint
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