Vehicle and Power Issues
OnStar services require a vehicle electrical system, wireless service, and GPS satellite technologies to be available and operating for features to function properly. These systems may not operate if the battery is discharged or disconnected.
See also:
Radio(s)
VOL/ : Press to turn the system
on and off. Turn to increase or
decrease the volume.
FM/AM: Press to select between
FM or AM.
: Press to select XM™,
if equipped.
TUNE/TONE: Turn to select ...
Checking Coolant
The vehicle must be on a level surface when checking the coolant level.
Check to see if coolant is visible in the coolant surge tank. If the coolant
inside the coolant surge tank is boiling, do not ...
Meet the Wedge
The CTS sedan's exterior is angular, but the new CTS coupe takes the design
theme to a new level. There are creases everywhere, and while most meet and
intersect to create a unique-looking coupe t ...