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:
Adjusting the Speakers (Balance/Fade)
BAL/FADE (Balance/Fade):
To adjust the balance or fade:
1. Press until the speaker control tabs display.
2. Continue pressing to highlight the tab, or press the softkey under the tab.
3. To adju ...
Radio(s)
Radio with CD, DVD, and USB Port
: Press to turn the system on and off. Turn to increase or decrease the volume.
BAND: Press to choose between FM, AM, or XM™, if equipped.
: Select radio stat ...
When to Change Engine Oil
This vehicle has a computer system that indicates when to change the engine oil and filter. This is based on a combination of factors which include engine revolutions, engine temperature, and miles dr ...