Pontiac 1993 Trans Sport Owner's Manual page 242

.:
When your brake fluid falls to a low
level, your brake warning light will
come on. See the Index under Brake
System Warning Light.
What to Add:
When you do need brake fluid, use only
DOT-3 brake fluid-such as Delco
Supreme 1 1 @ (GM Part No. 1052535).
Use new brake fluid fkom a sealed
container only.