GMC 2003 Sierra - Manual (Page 198)

Transmission Temperature Gage
Canada
Vaur vehicle rtiay be equipped with a Iransmiss-ion
temperature gage.
When ypur igniUan on, Ihg gaga shows the
temperature of the transmission fluid. The normal
operating range is Irom
to about
265'F (130=CK
At apprOiimatefy (130‘'C), the driver information
center wH( display a TRANSMISSION HOT message
and the iren&mi&^ion will enter a transmission protection
mode. When the transmission enters the protectjon
motJe, you may notice
a change in the transimi^sion
shifting patterns, the transmission will return to nomial
shifting patterns when the transmission fluid temperature
tails below 3S0T (ISTCK
See Driver informsifan Cerjter fOiC) cm pßg9 3'50 for
further infCHTnalion.
If your vehicle an Allison transmission, and the Iluid
reaches temperatures of approximately 275^f {135^C)
or greater, ihe driver information center will display
a TRANS HOT IDLE ENGINE warning message and a
chime will sound urilil the temperature falls below
2fi5'^F (120'^C) degrees. PuiE the vehicJe off the roadway
when it Is safe to do so. Set the parking brake, place
Iha transmission in PARK (P} and allow the engine
10 idte unljf the transrnission temperature tails below
If the transmission continues to operate
above 205“F f130'^C), contact your nearest deaJer or
the GM Roadside Assistance Center. See
FfoadsiciB
AssislsrjCB Program on pag^ 7'ß-
N o U cb : If you keep driving your vehicle with the
transmisstun temperatLire gags above the normal
operating range, you can damage the transmisaiorr.
This cgyldi tead to costly repairs that may not be
coveted under your warranty.
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