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The smallest port with either a green or light blue cap on it.
It matters if it has ac or not. If it is a non ac vehicle, the hoses and coolant flow from the fitting close to the thermostat housing to the lower heater core tube, then out the upper heater core tube to the fitting on the water pump. If it has ac, the hose from the upper heater core tube connects to the fitting on the radiator.
it is on the passenger side of the engine compartment, and is part of the big silver accumilator.
how to replace AC compressor on a 97 Buick park Ave
The LOW pressure fitting is SMALLER than the HIGH pressure fitting.
how much ac oil do i put in my ac copressor
The AC low pressure port on a 1999 Buick Century is located on the side of the AC accumulator. This is positioned in the left, rear of the engine compartment.
junk it
just order a belt for a 95 Buick le Sabre without ac.
You always want to put freon in an ac by using the small fitting low side on 134a systems. The large fitting is high side. Do not use it
I just did it on 2003 buick rendezvous,i bought a can of fix leak,oil,freon all in one from advance and hooked it up to the lower a/c port and charged it to about 35 psi and the air blows like new.
ac fuse location