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:
Seat Adjustment
To adjust the seat:
Move the seat forward or rearward by sliding the control forward or rearward.
Raise or lower the front or rear part of the seat cushion by moving the
front or rear of th ...
If the Vehicle Is Stuck
Slowly and cautiously spin the
wheels to free the vehicle when
stuck in sand, mud, ice, or snow.
If stuck too severely for the traction
system to free the vehicle, turn the
traction system of ...
Tire Pressure
If the vehicle is a hybrid, see the hybrid supplement for more information.
Tires need the correct amount of air pressure to operate effectively.
Notice: Neither tire underinflation nor overinflatio ...