GMC 2011 Sierra Denali, Owner'S Manual, Page: 371 / 492

Vehicle Care 10-27
Refer to the Maintenance Schedule
to determine when to check the
brake fluid. See
Scheduled
Maintenance on page 11 ‑ 2 .
Checking Brake Fluid
Check brake fluid by looking at the
brake fluid reservoir. See
Engine
Compartment Overview on
page 10
‑ 6 .
The fluid level should be above
MIN. If it is not, have the brake
hydraulic 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.
What to Add
Use only new DOT 3 brake fluid
from a sealed container. See
Recommended Fluids and
Lubricants on page 11
‑ 7 .
Always clean the brake fluid
reservoir cap and the area around
the cap before removing it. This
helps keep dirt from entering the
reservoir.
{
WARNING
With the wrong kind of fluid in
the brake hydraulic system, the
brakes might not work well.
This could cause a crash.
Always use the proper brake fluid.
Notice:
. Using the wrong fluid can
badly damage brake
hydraulic system parts.
For example, just a few
drops of mineral-based oil,
such as engine oil, in the
brake hydraulic system can
damage brake hydraulic
system parts so badly that
they will have to be replaced.
Do not let someone put in
the wrong kind of fluid.
. If brake fluid is spilled on the
vehicle's painted surfaces,
the paint finish can be
damaged. Be careful not to
spill brake fluid on the
vehicle. If you do, wash it off
immediately.