1996 Chevrolet Suburban Owner's Manual - Page 319

To Check BrakeFluid You can check the brake fluid without taking off the cap. Just look at the windows on the brake fluid reservoir. The fluid levels should be above MIN. If they aren't, have your brake system checked to see if there is a leak. After work is done o n the brake hydraulic system, make sure the levels are above MIN and below the top of each window. 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 from a sealed containeronly, and always clean the brake fluid reservoir cap before removing it. @ NOTICE: Don't let someone putin the wrong kindof fluid. For example, just a few drops of mineral-based oil, such as engine oil, in your brake system can damage brake system parts so badly that they'll have to be replaced. Brake fluid can damage paint,so be careful not to spill brake fluid on yourvehicle. If you do, wash it off immediately. See "Appearance Care" in the Index. 6-42