Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring System.
If a diagnostics check is needed between e-mails, push 
, and an Advisor can run a check.
See also:
Rear Vision Camera Error Messages
SERVICE REAR VISION CAMERA SYSTEM: This message can display on the radio screen
when the system is not receiving information it requires from other vehicle systems.
If any other problem occurs or i ...
Brake System Warning Light
With the ignition on, the brake system warning light comes on when the parking brake is set. If the vehicle is driven with the parking brake engaged, a chime sounds when the vehicle speed is greater t ...
Responsive driving experience
The '07 Yukon and Yukon Denali are built on GM's new full-size SUV platform,
which incorporates features such as a new, fully boxed frame, coil-over-shock
front suspension and rack-and-pinion stee ...