Oldsmobile 2003 Bravada Owner's Manual page 294

If it is, you should have your brake system fixed, since a
leak means that sooner or later your brakes won't
work well, or won't work at all.
So, it isn't a good idea to "top off' your brake fluid.
Adding brake fluid won't correct a leak. If you add fluid
when your linings are worn, then you'll have too
much fluid when you get new brake linings. You should
add (or remove) brake fluid, as necessary, only when
work is done on the brake hydraulic sys+-n.
Checking Brake Fluid
You can check the brake fluid without taking off the cap.
If you have too much brake fluid, it can spill on
the engine. The fluid will burn if the engine is
hot enough. You or others could be burned,
and your vehicle could be damaged. Add brake
fluid only when work is done
on
the brake
hydraulic system. See "Checking Brake Fluid"
in this section.
Refer to the Maintenance Schedule to determine when
to check your brake fluid. See
farf
C:
Periodic
Maintenance Inspections on page
6- 15.
After work is done on the brake hydraulic system, make
sure the level is above the MIN but not over the
MAX mark.
5-35