Chevrolet 2007 Silverado 1500 Pickup Owner's Manual page 514

Checking Brake Fluid
You can check the brake fluid without taking off
the cap.
After work is done on the brake hydraulic system,
make sure the level is above the MIN but not
over the MAX mark.
514
Just look at the brake
fluid reservoir. The fluid
level should be above
MIN. If it is not, have
your brake system
checked to see if
there is a leak.
What to Add
When you do need brake fluid, use only DOT-3
brake fluid. Use new brake fluid from a sealed
container only. See Recommended Fluids
and Lubricants on page 626.
Always clean the brake fluid reservoir cap and the
area around the cap before removing it. This
will help keep dirt from entering the reservoir.
CAUTION:
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With the wrong kind of fluid in your brake
system, your brakes may not work well, or
they may not even work at all. This could
cause a crash. Always use the proper
brake fluid.