Chevrolet 1996 Tahoe Owner's Manual page 285

Checking Brake Flu: What to Add
When you do need brake fluid, use only DOT-3 brake
fluid
--
such as Delco Supreme 11
@
(GM Part
No. 1052535). Use new brake fluid from a sealed
container only, and always clean the brake fluid
reservoir cap before removing it.
A
CAUTION:
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.
You can check the brake fluid without taking off the cap.
Just look at the window on the brake fluid reservoir. The
fluid level should be above MIN. If it isn't, have your
brake system checked to see if there is a leak.
After work is done on the brake hydraulic system,
make sure the level is above MIN and below the top
of the window.
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