Horn
Press near or on the horn symbols on your steering wheel pad to sound the horn.
See also:
When to Inspect the Engine Air
Cleaner/Filter
Inspect the air cleaner/filter at the Maintenance II
intervals and replace it at the first oil change after each
50,000 mile (80 000 km) interval. See Scheduled
Maintenance for more information. ...
Unable to Connect to OnStar
Message
If there is limited cellular coverage
or the cellular network has reached
maximum capacity, this message
may come on. Push to try the
call again or try again after driving a
few miles into ...
Engine Air Cleaner/Filter
See Engine Compartment Overview for
the location of the engine air cleaner/filter. ...