Chevrolet T-Series, Owner'S Manual

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Rear Axle Differential Lock Control
If your vehicle has a
controlled traction or
locking differential axle,
the switch is located
in the center of
the instrument panel.
You’ll see this control on single rear axle vehicles.
If you’re approaching a slippery surface where it
looks like one or even both wheels may start to slip,
you can press the switch to off. It locks your rear
differential so that power is transmitted equally to
both rear wheels.
Let up on the accelerator before you turn on your
rear axle differential lock.
Notice: 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)
Your 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 the TCS on/off button will
come on when the TCS is limiting wheel spin.
You may feel or hear the system working, but this
is normal. The TCS will function at speeds up
to about 25 mph (42 km/h).
The TCS may operate on dry roads under some
conditions. When this happens, you may notice a
reduction in acceleration. This is normal and
doesn’t mean there’s a problem with your 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.
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