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 
, and an
Advisor can run a check.
See also:
Outside Heated Mirrors
When the rear window defogger is turned on, the
driver’s and passenger’s outside rearview mirrors
also heat to help clear them of ice, snow, and
condensation. ...
At Least Once a Year
Starter Switch Check
CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the
vehicle moves, you or others could be
injured.
1. Before you start, be sure you have e ...
Rear Door Security Locks
Rear door security locks prevent passengers from
opening the rear doors from the inside.
The rear door security locks
are located on the inside
edge of each rear door.
The rear doors must be ...