GMC 2003 Sierra - Manual (Page 197)

The traction off llghi may come on for the folEpwing
reasorts:
% (f you turn the system off ty pressing the TAS
on/off butlort located to ihe left of the steering >rtfheel,
the light will come on and stay on. To turn the
syetem bach on, press The button again; the light
should go qff.
IF you move (he shift lever to FIRST (1J, the light will
come on and stay on to indicate that (he trac(ion
system is off. This is normal oparadon. To lum the
system back on, move the shiFl lever back (o a
position other (han FIRST {1); the light should go off.
See Traciioft Assisi System (TAS) on p^ige ^-9.
\ The lig ht wil I come do and slay on if the TAS
automatic engagement feature has been turned off.
To lorn the syslem on, press the TAS o№on button;
the light should go off. To turn the automadc
engagemenl feature back on, see
Trsction Assisi
System {TAS) on page 4-9.
\ If Ihe Traction Assist Syslem is affected by an
anti-lock brake syslem. TAS ar engine-related
prcbiem, the system will (urn off and Ihe light will
come on. Have your vehicle serviced.
^ If the vehicle fs driven over an extremety rough road,
the System w^н lom off and Ihe light will come on. The
light will go off a few seconds after the rough road
conditions go away or when the vehicle comes to a
compleie slop. This is normal operation.
3-42 --------------------------------------------------------------------
Engine Coolant Temperature Gage
This gage shows Ihe engine cootant temperature.
It also provides an Indicator ol how hard your vehicle Is
working. Duong a majority of the operaUnn. ihs gage
will read 210'F ft OCX) or less. It you are pulling a load
or going up hills, it is normal for ihe temperature to
Tuctuate and approach Ihe iSQ'^F {123'^C} mark. If the
gage reaches Ihe (12S"C) mark, it Indicates
that tha coolingi system is working beyond Its capacity.
Sse Engine Overheating or page 5-36.