Chevrolet 1994 Lumina Owner's Manual page 147

2. Then keep turning the pressure cap,
but now push down as you turn it.
Remove the pressure cap.
3.
After the engine cools, open the
coolant air bleed valves.
3.1 L V6 (VIN Code T): There are two
bleed valves. One is located on the
thermostat housing. The other is
located on the thermostat bypass tube.
3.4L V6 (VIN Code X): There are two
bleed valves. They are located on the
thermostat housing and heater inlet
-
pipe.
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