If equipped with the rear wiper/ washer, the controls are on the end of the windshield wiper lever.

Turn the rear wiper/washer band to operate the rear window wiper/ washer.
ON: Turns the rear wiper on for continuous wipes.
OFF: Turns the rear wiper off.
(Rear Washer): Sprays washer fluid
on the rear window. The control returns to its ON or OFF starting position when
released.
Rear Wiper Arm Assembly Protection
If the vehicle is equipped with an automatic transmission, when using an automatic car wash, move the rear wiper control to OFF to disable the rear wiper. If the transmission is in N (Neutral) and the vehicle speed is very slow, the rear wiper will automatically stop at the base of the rear window.
The wiper operations return to normal when the transmission is no longer in N (Neutral) or the vehicle speed has increased. The rear wiper will also stop when the liftgate is open.
Reverse Gear Wipes
If the rear wiper control is off, the rear wiper will automatically operate continuously when the shift lever is in R (Reverse), and the front windshield wiper is performing low or high speed wipes. If the rear wiper control is off, the shift lever is in R (Reverse), and the front windshield wiper is performing interval wipes, then the rear wiper automatically performs interval wipes.
This feature can be changed. See Vehicle Personalization on page 5-27.
The windshield washer reservoir is used for the windshield and the rear window. Check the fluid level in the reservoir if either washer is not working. See Washer Fluid on page 10-19.
Windshield Wiper/Washer
ClockPictures and Movies (Picture System)
The infotainment system can view picture files stored on a USB storage device
and devices that support Media Transfer Protocol (MTP).
Picture System Information
Caution for Using Picture Files
File size:
JPG: Within 64 to 5,000 pixels (Width) and 64 to 5,000 pixels (Height).
BMP, PNG, GIF ...
Navigation
OnStar navigation requires a specific OnStar subscription plan.
Press to receive directions or
have them sent to the vehicle navigation screen, if equipped.
Destinations can also be forwarded to the vehicle from MapQuest.com.
Turn-by-Turn Navigation
Press to connect to a live
Advisor.
...
Roadside Assistance Program
For U.S.-purchased vehicles, call 1-800-243-8872. (Text Telephone (TTY): 1-888-889-2438.)
For Canadian-purchased vehicles, call 1-800-268-6800.
Service is available 24 hours a day, 365 days a year.
Calling for Assistance
When calling Roadside Assistance, have the following information ready:
...