Checking Brake Fluid
You can check the brake fluid without taking off the cap.

Look at the brake fluid reservoir. The fluid level should be above MIN. If it is not, have your brake system checked to see if there is a leak.
After work is done on the brake hydraulic system, make sure the level is above the MIN, but not over the MAX mark.
See also:
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 o ...
Collision/Detection Systems
Select the Collision/Detection
Systems menu and the following will
be displayed:
• Side Blind Zone Alert System ...
Outside Heated Mirrors
When the rear window defogger is turned on, the
driver’s and passenger’s outside rearview mirrors
also heat to help clear them of ice, snow, and
condensation. ...
