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:
Interior
The ESV's extended dimensions don't yield significant gains for first- or
second-row occupants, but third-row passengers gain nearly 10 inches of legroom.
Cargo volume behind the third row increas ...
Airbag Readiness Light
The system checks the airbag's electrical system for possible malfunctions. If
the light stays on it indicates there is an electrical problem. The system check
includes the airbag sensor(s), p ...
When to Change Engine Oil
This vehicle has a computer system that indicates when to change the engine oil
and filter. This is based on a combination of factors which include engine revolutions,
engine temperature, and mile ...