Driving on Grades
Reduce speed and shift to a lower gear before starting down a long or steep downgrade. If the transmission is not shifted down, the brakes might have to be used so much that they would get hot and no longer work well.
The vehicle can tow in D (Drive).
Use a lower gear if the transmission shifts too often.
When towing at high altitude on steep uphill grades, engine coolant boils at a lower temperature than at normal altitudes. If the engine is turned off immediately after towing at high altitude on steep uphill grades, the vehicle could show signs similar to engine overheating.
To avoid this, let the engine run while parked, preferably on level ground, with the transmission in P (Park) for a few minutes before turning the engine off. If the overheat warning comes on, see Engine Overheating.
See also:
Fuel System Messages
FUEL LEVEL LOW
This message displays when the vehicle is low on fuel. Refuel as soon as
possible
TIGHTEN GAS CAP
This message displays when the fuel cap is not on tight. Tighten the fuel
ca ...
OnStar®
If the vehicle is equipped with
an active OnStar system, that
system may also record data in
crash or near crash-like situations.
The OnStar Terms and Conditions
provides information on data ...
Programming the Power Windows
Programming the power windows may be necessary if the vehicle's battery has
been disconnected or discharged.
If the window will not express up after power has been restored and a
message is displ ...






