Chevrolet 2002 Tahoe Owner's Manual page 164

Low Traction Light (If Equipped)
You may feel or hear the system working or notice a
lack of accelerator response, but this is normal.
The LOW TRACTION light also comes on briefly when
you turn your ignition to RUN. If the light doesn't come
on then, the system may require service; have it fixed so
it will be there to tell you when the traction system is
active. Slippery road conditions may exist if this light
comes on, so adjust your driving accordingly.
2-78
If you have the Traction
Assist System, this light
will come on when the
system is limiting wheel
spin. See "Traction Assist
System" in the Index.
Traction Off Light (If Equipped)
If the light doesn't come on then, the system may
require service; have it fixed so it will be there to warn
you if the system is turned off.
If the light stays on, or comes on when you're driving,
there may be a problem with your Traction Assist
System and your vehicle may need service. When this
light is on, the system will not limit wheel spin. Adjust
your driving accordingly.
If you have the Traction
Assist System, this light
should come on briefly
when you turn the ignition
to RUN.