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.
Low side service port is against the firewall just underneath the alternator. It has a Blue cap on it.
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.
That would be the low pressure service port and it should be located on the receiver/dryer.
The recharge port is on the larger AC pipe
On the accumulator.
You can add Freon to your 1999 Chevy cooling system through the low pressure port. Connect your Freon bottle to the low pressure port and release the Freon into the system.
The 2001 Chevrolet Impala low side service port can be found on the top of the air conditioner compressor. The port will be labeled as the low pressure port.
To the fuel tank
Under the air filter compartment.
The 1999 Chevy Lumina A/C service ports are located on the drivers side of the vehicle in the front, right next to the battery, which is located under the windshield washer reservoir, it will kindof take some contorting to get to it, but that's where GM put it
The low pressure service port on your Chevrolet K 1500 air conditioning compressor will be the one closest to the front of the engine compartment. The low pressure service port should be labeled.
Into the low side service port.