Chevrolet 1998 Tracker Owner's Manual page 267

If
it is, you should have your brake system fixed, since a
Checking Brake Fluid
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 system.
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.
Refer to the Maintenance Schedule to determine when to
check your brake fluid. See "Periodic Maintenance
Inspections" in the Index.
You can check the brake
fluid without taking off
the cap.
Just look at the brake
fluid reservoir. The fluid
level should be above MIN.
If it isn't, 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 or the top of the window on the side
of the reservoir.
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