Traction Control System (Tcs) - GMC 2010 T-Series Owner's Manual

If approaching a slippery surface where one or both
wheels may start to slip, press the switch to off. The
rear differential locks so power is transmitted equally to
both rear wheels.
Let up on the accelerator before turning on the rear axle
differential lock.
Turning on the inter-axle differential lock
while the rear wheels are spinning freely, as they
might on snow or ice, can damage the axle(s). Turn
on this control only while the wheels are not
spinning freely.

Traction Control System (TCS)

The vehicle may have a traction control system that
limits wheel spin. This is especially useful in slippery
road conditions. The system operates only if it senses
that one or both of the rear wheels are spinning or
beginning to lose traction. When this happens, the
system applies the brake(s) at the affected wheel(s).
The bottom light on TCS on/off button will come on
when the TCS is limiting wheel spin. The system may
be heard or felt while it is working, but this is normal.
TCS will function at speeds up to about 25 mph
(42 km/h).
TCS may operate on dry roads under some conditions.
When this happens, a reduction in acceleration may
be noticed. This is normal and doesn't mean there's a
problem with the vehicle. Examples of these conditions
include a hard acceleration in a turn, an abrupt
upshift or downshift of the transmission or driving on
rough roads.
When the light in the top of the TCS button is on, TCS
is off and will not limit wheel spin. Adjust your driving
accordingly.
The light in the top of the TCS button will come on if
TCS is turned off by pressing the TCS on/off button.
The light may also come on if a problem has been
detected in either the traction control system or the
anti-lock brake system.
The traction control system automatically comes on
whenever the vehicle is started. To limit wheel spin,
especially in slippery road conditions, the system
should always be left on. But the traction control
system can be turned off if needed. Turn the system
off if the vehicle ever gets stuck in sand, mud or snow
and rocking the vehicle is required. See Rocking Your
Vehicle to Get It Out on page 4 17 for more
information.
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