at the accumulator
You can find the low pressure valve for your 1994 Pontiac Transport on the top of the air conditioner compressor. The low pressure valve will have a blue top.
The 1997 Pontiac Sunfire air conditioning low pressure switch can be found on the top of the air conditioning compressor. The low pressure switch will be labeled as the low pressure port.
On the rightside of the car. The low pressure line with the blue cap.
the low pressure valve is on the passenger side. follow low pressure line and you will see it
The low pressure charging valve is on the accumulator........
on passenger side of engine, half way up
Refrigerant is added to a 1997 Pontiac Sunfire by removing the safety cap on the low pressure cooling line at the rear of the engine compartment. The charging line is then hooked up and refrigerant added until the pressure reaches specified levels.
BEHIND THE COMPRESER
The low pressure port on the 99 Grand am is on the passenger side. It is right against the firewall.
low freon, bad pressure switch, bad compressor clutch.
it is located inside of the oil pan. if you have low pressure and have high milage you could have bad crank bearing.
My 1997 Grand AM low pressure valve is on the air conditioner. I had to access it from the under the car. It has a blue cap on it. IF your looking from the top of the engine you can see it on the right side of the air conditioner.