Which line is high pressure and low for adding refrigent to a 1997 Buick LeSabre custom

The ac low side is the line going to the dryer. Hope this helps.

Obviously can be one of a very large number of problems. If there are no trouble codes (DTCs), still could be a possible fuel delivery system (fuel pump, filter, regulator, throttle body) or ignition problem. I would start by checking the fuel pressure carefully - too high or low will cause this. Also the coil pack can fail without a trouble code - check for spark at a plug.

compressor comes on and off normally mean low on freon or compressor is going out, i would check freon first. low pressure is normally the bottom line but you may want to ask someone at your local part store to pull the diagram to make sure

usually the service port is located on the accumulator. this is the big can looking silver thing under the hood. although i dont recommend just throwing freon in it without the proper gauges to monitor the high and low pressure. you can damage the compressor and components. if your leaking freon having it repaired is more logical then adding freon and having it leak out again. hope this helps

low side 30 to 35

high side 150 - 220

Depending on the temp, Colder = lower numbers - hotter = higher numbers.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

not exactly sure but using info below you can find it.

Remember the flow for the a/c system is :
1. From the compressor a high pressure (HP) gas goes to the condenser in front of the radiator.
2. From the condenser a HP liquid goes to an expansion device (orifice tube or expansion valve)
3. From expansion device the low pressure gas enters the firewall to the evaporator.
4. From evaporator the low pressure liquid/gas mixture goes through the dryer back to the compressor suction.

There will be about a 1" nut on the low pressure line between the firewall and the compressor. Remove nut and on the male side use a pair of kneedle nose pliers and remove orifice tube. Note orientation of tube.

Replace tube, reassemble, evacuate air from system, recharge with freon.

check for a vaccum leak!!!!!!!!!

U have to go under the hood of the car an there should be the light bulb encasing that holds the bulb turn it to the right or the left it will come out .most newer cars low beam an high beam bulb are to gether as one bulb .

located on the line

Low side is the smaller of the two fitting wise, but usually the bigger hose.