9-38 Driving and Operating
When the vehicle is started
and begins to move, the system
performs several diagnostic checks
to ensure there are no problems.
The system may be heard or
felt while it is working. This is
normal and does not mean there
is a problem with the vehicle.
The system should initialize
before the vehicle reaches 32 km/h
(20 mph). In some cases, it may
take approximately 3.2 km (2 mi) of
driving before the system initializes.
The Traction Control System may
activate on dry or rough roads or
under conditions such as heavy
acceleration while turning or abrupt
changes in output from the electric
drive unit. When this happens,
a reduction in acceleration may
be noticed, or a noise or vibration
may be heard. This is normal.
The TCS/StabiliTrak warning light
will flash to indicate that the traction
control system is active.
If there is a problem detected, the
SERVICE TRACTION CONTROL
message displays in the DIC.
See Ride Control System Messages
on page 5‑50. When this message
is displayed and
d comes on and
stays on, the vehicle is safe to drive
but the system is not operational.
If
d comes on and stays on, reset
the system:
1. Stop the vehicle.
2. Turn the vehicle off and wait
15 seconds.
3. Start the vehicle.
If
d still comes on and stays on,
the vehicle needs service.
Adding non‐GM accessories
can affect vehicle performance.
See Accessories and Modifications
on page 10‑4 for more information.
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