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:
Door Ajar Messages
DRIVER DOOR OPEN
This message displays when the
driver door is not closed completely.
Close the door completely.
HOOD OPEN
This message displays when the
hood is not closed completely.
Make s ...
Vehicle Load Limits
It is very important to know how much weight your vehicle can carry. This weight
is called the vehicle capacity weight and includes the weight of all occupants,
cargo, and all nonfactory-installed ...
Torque Lock
Torque lock is when the weight of the vehicle puts too much force on the
parking pawl in the transmission. This happens when parking on a hill and
shifting the transmission into P (Park) is not done ...