GMC 1996 Sonoma Owner's Manual page 254

Checking Brake Fluid
After work is done on the brake hydraulic system,
make sure the levels are above MIN and beiow the top
of each window.
What to Add
When you do need brake fluid, use only DOT-3 brake
fluid -- such as Delco Supreme I 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.
G r o n g kind of fluid in your brake
system, your brakes may not work well, or they
may not even work at all. This could cause a
You can check the brake fluid without taking off the cap.
Just look at the windows on the brake fluid reservoir. crash. Always use the proper brake fluid.
The fluid levels should be above MTN. I f they aren't,
have your brake system checked to see if there is a leak.
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