Chevrolet 2003 Monte Carlo Owner's Manual page 273

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3400 V6 Bleed Valve #1 3400 V6 Bleed Valve #2
4. After the engine cools, open the coolant air bleed
valve or valves.
3400 V6 engine: There are two bleed valves. One
is located on the thermostat housing. The other
is located on the thermostat bypass tube.
3800 V6 engine: There is one bleed valve.
It is
located on the thermostat housing.
3800 V6 Bleed Valve
5. Fill the radiator with the proper DEX-COOL@
coolant mixture, up to the base of the filler
neck. See
Engine
Coolant on
page
5-25 for more
information about the proper coolant mixture.
5-38