GMC 2012 Savana Owner's Manual page 279

Refer to the Maintenance Schedule
to determine when to check the
brake fluid. See
.
Check brake fluid by looking at the
brake fluid reservoir. See
.
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.
Use only new DOT 3 brake fluid
from a sealed container. See
Always clean the brake fluid
reservoir cap and the area around
the cap before removing it. This
helps keep dirt from entering the
reservoir.
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.
.