GMC 2011 Sierra - Manual (Page 456)

Black plate (32,1) GMC Sierra Owner Manual - 2011
10-32 Vehicle Care
Brake Fluid
The brake master cylinder reservoir
is filled with DOT 3 brake fluid.
See Engine Compartment Overview
on page 10‑6 for the location of the
reservoir.
There are only two reasons why
the brake fluid level in the reservoir
might go down:
. The brake fluid level goes down
because of normal brake lining
wear. When new linings are
installed, the fluid level goes
back up.
. A fluid leak in the brake
hydraulic system can also
cause a low fluid level. Have
the brake hydraulic system fixed,
since a leak means that sooner
or later the brakes will not
work well.
Do not top off the brake fluid.
Adding fluid does not correct a
leak. If fluid is added when the
linings are worn, there will be too
much fluid when new brake linings
are installed. Add or remove brake
fluid, as necessary, only when work
is done on the brake hydraulic
system.
{
WARNING
If too much brake fluid is added,
it can spill on the engine and
burn, if the engine is hot enough.
You or others could be burned,
(Continued)
WARNING (Continued)
and the 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 the brake fluid falls to a low
level, the brake warning light comes
on. See Brake System Warning
Light on page 5‑27.
Refer to the Maintenance Schedule
to determine when to check the
brake fluid. See Scheduled
Maintenance on page 11‑2.