Chevrolet Silverado Classic 2007 Owner's Manual page 257

If your vehicle has an Allison
the fluid reaches temperatures of approximately
275°F (135°C) or greater, the DIC will display
a TRANS HOT IDLE ENGINE warning message
and a chime will sound until the temperature
falls below 265°F (130°C). Pull the vehicle off
the roadway when it is safe to do so. Set
the parking brake, place the transmission in
PARK (P) and allow the engine to idle until
the transmission temperature falls below 265°F
(130°C). 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 646.
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.
®
transmission, and 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 619 for the proper transmission
maintenance intervals.
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