1996 GMC Safari Owner's Manual - Page 263

Checking Brake Fluid What to Add When you do need brake fluid, use only DOT-3 brake fluid -- such as Delco Supreme I I (GM Part No. 1052535). Use new brake fluid from a sealed container only, and always clean the brake fluid reservoir cap before removing it. @ 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 MTN. 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 MTN and below the top of the window. r With the wrong kindof fluid in your brake system, your brakes may not work well, or they may not even workat all. This could cause a crash. Always use the proper brake fluid.