1996 GMC Savana Van Owner's Manual - Page 251

Checking Brake Fluid What to I 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 container only, and always clean the brake fluid reservoir cap before removing it. @ With the wrong kindof fluid in your brake system, your brakes may not work well, they or may not even workat 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 windows on the brake fluid reservoir. The fluid levels should be above MIN. If they aren't, have your brake system checked t o see if there is a leak. After work is done on the brake hydraulic system, make sure the levels are above MIN and below the top of each window. 6-27