Pontiac 2002 Firebird - Manual (Page 281)

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CAUTION:
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.
When your brake fluid falls to a low level, your brake
warning light will come on. See “Brake System Warning
Light” in the Index.
Checking Brake Fluid
You can check the brake fluid without taking off the cap.
Just look at the brake fluid reservoir. The fluid level
should be above the plastic seam in the reservoir (A).
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 plastic seam (B),
near the base of the filler neck.