Transmission Messages
DIFFERENTIAL HOT, REDUCE SPEED (CTS-V ONLY)
This message displays and a chime sounds if the differential fluid temperature exceeds 150°C (300°F). Driving aggressively or at high speeds can cause the differential fluid temperature to be higher than normal. If this message appears, you may continue to drive at a slower speed. If you have been operating the vehicle under normal driving conditions, the vehicle may need service. See your dealer for an inspection.
To acknowledge the message,
press
. The message reappears
and a chime sounds every
two minutes until this condition
changes. If you do not clear the
message, it will remain on until the
condition changes.
SERVICE TRANSMISSION
This message displays when there is a problem with the vehicle's transmission. Have the vehicle serviced by your dealer.
SHIFT TO PARK (AUTOMATIC TRANSMISSION ONLY)
If the vehicle has the keyless access system, this message displays if the vehicle is not in P (Park) while the engine is being turned off. The vehicle will be in ACC/ACCESSORY. Once the shift lever is moved to P (Park), the ignition needs to be turned off. If the ignition is not turned off, the vehicle will remain in ACC/ACCESSORY.
To avoid draining the battery, turn the ignition off before leaving the vehicle.
SPORT MODE
This message displays when the vehicle is in sport mode.
The transmission gear position will also be displayed when DSC is in use. See Manual Mode for more information.
TRANSMISSION HOT IDLE ENGINE
This message displays when the transmission fluid in the vehicle is too hot. Stop the vehicle and allow it to idle until the transmission cools down or until this message is removed.
See also:
How to Add Coolant to the Coolant Surge Tank
Notice: This vehicle has a specific coolant fill procedure.
Failure to follow this procedure could cause the engine to overheat and be
severely damaged.
If no problem is found, check to see if co ...
Connections
OnStar Hands-Free Calling allows
calls to be made and received from
the vehicle. The vehicle can also
be controlled from a cell phone
through the OnStar mobile app. See
www.onstar.com for co ...
Tire Rotation
Tires should be rotated every 12 000 km (7,500 mi). See Maintenance Schedule
.
Tires are rotated to achieve a uniform wear for all tires. The first rotation
is the most important.
Any time ...






