Chevrolet 1997 Blazer Owner's Manual page 232

The coolant level should be at the ADD mark.
If it isn't, you may have a leak in the radiator h
heater hoses, radiator, water pump or somewhere else lr
w l w 4 4 l
A
CAUTION:
Heater and radiator hoses, and other engine
parts, can be very hot. Don't touch them. If you
do, you can'be burned.
Don't run the engine if there is a leak. If you run
the engine, it could lose all coolant. That could
cause an engine
fire,
and you could be burned.
Get any leak fixed before you drive the vehicle.