1998 Chevrolet Blazer Owner's Manual - Page 300

Checking Brake Fluid You can check the brake fluid without taking off the cap. What to Add When you do need brake fluid, use only DOT-3 brake fluid -- such as Delco Supreme 1l @(GM Part No. 12377967). Use new brakefluid from a sealed container only. Always clean the brakefluid reservoir cap and the area around the cap before removing it. This will help keep dirt from entering the reservoir. A CAUTION: Just look at the brakefluid 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 thelevel is above theMIN but not over the MAX mark or the top of the window the side on of the reservoir. With the wrong kind fluid in your brake of 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. 6-30