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on the back side of motor by firewall
The 2002 Chevy Cavalier low side service port can be found on the top of the air conditioner compressor. The low side service port will be labeled as the low pressure port.
The AC low side service port on a 1999 Chevy Astro van is located next to the firewall. It is the port that is closest to the evaporator.
2001 cavaliers have R134A systems and they have special port connections that only fit r134a guage sets. The low side port and the high side port have quick disconnect fittings that are different sizes so you can't hook them up wrong or backwards. The cavaliers also have color coded caps on the a/c ports to help you out. The low side is blue and the high side is red. The low side port is on the top of the engine right by the passenger side shock tower. The high side port is just behind the radiator near the top on the passenger side.
The recharge port is on the larger AC pipe
it is on the side almost at the bottom of the radiator..very hard to get too !!!!
clogged drainage hole in the cowl (under the wipers)...
On the accumulator.
It is on the driver's side frame just forward of the gas tank.
if it's the 3100 V6, it is on the right side of the front valve cover
Its on the low side (suction side) from the compressor to the accumulator........
Not sure what your asking yes you charge from the low pressure port it is the smaller one your hose should not fit on the high pressure side