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:
Traction Control System (TCS)/StabiliTrak® Light
The StabiliTrak or Traction Control
System (TCS) indicator/warning
light comes on briefly when the
engine is started.
If the light does not come on, have
the vehicle serviced by your dealer ...
Steering
Hydraulic Power Steering
Your vehicle has hydraulic power steering. It may require maintenance. See
Power Steering Fluid.
If power steering assist is lost due to a system malfunction, the vehic ...
Engine Compartment Fuse Block
The Engine Compartment Fuse Block is located in the engine compartment, on the
driver side of the vehicle. Lift the cover for access to the fuse/relay block.
If the vehicle is a hybrid, see the h ...