Chevrolet 1995 Tahoe Owner's Manual page 251

Cooling System
-
Diesel Engines
When you decide it's safe to lift the hood, here's what you'll see:
A. Coolant surge tank pressure cap
B. Engine fan(s)
C. Radiator
If the coolant inside the coolant surge tank is boiling, don't do anything else
until it cools down.
The coolant level
should be at or above
the COLD mark. If it
isn't, you may have a
leak in the radiator
hoses, heater hoses,
radiator, water pump
1
or somewhere else in
the cooling system.
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