Brake Master Cylinder Fluid - GMC Hummer H3 2008 Owner's Handbook Manual

Service and Maintenance

Brake Master Cylinder Fluid

There are two reasons why the
brake fluid level in the master
cylinder might go down. The first
is that the brake fluid level decreas-
es by an acceptable amount
during normal brake lining wear.
When new linings are put in, the
fluid level goes back up. The other
reason is that fluid may be leaking
out of the brake system. If it is, you
should have the brake system
fixed.
. . . 270
It is not a good idea to "top up"
your brake fluid. Adding brake
fluid will not correct a leak. If you
add fluid when the linings are
worn, then there will be 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.
CAUTION
If there is 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 burnt, and your vehi-
cle could be damaged. Add
brake fluid only when work is
done on the brake hydraulic
system.
MAX
MAX
MIN
MIN
Check the master cylinder fluid
level in the "see-through" reservoir
at the intervals shown in the
Maintenance Schedule.
The level should be between the
MIN and MAX marks.
Low fluid level can indicate a leak
in the brake system. Have the vehi-
cle serviced as soon as possible.