GMC 2007 Sierra - Manual (Page 258)

If the transmission continues to operate above
265°F (130°C), contact your nearest dealer or the
GM Roadside Assistance Center. See Roadside
Assistance Program on page 644.
Notice: If you drive your vehicle with the
transmission temperature gage above normal
operating range, you can damage the
transmission. This could lead to costly repairs
that would not be covered by your warranty.
Do not drive your vehicle while the
transmission temperature gage reading is
above normal. See your dealer for service.
The following situations can cause the
transmission to operate at higher temperatures:
• Towing a trailer
• Hot outside air temperatures
• Hauling a large or heavy load
• Low transmission fluid level
• High transmission fluid level
• Restricted air flow to the radiator and the
auxiliary transmission oil cooler, if equipped.
A temporary solution to reduce hotter transmission
operating temperatures may be to let the
transmission cool down. If the transmission is
operated at higher temperatures on a frequent
basis, see Scheduled Maintenance (Gasoline
Engine) on page 617 for the proper transmission
maintenance intervals.
Malfunction Indicator Lamp
Check Engine Light
Your vehicle has a
computer which
monitors operation of
the fuel, ignition,
and emission control
systems.
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