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The cut-out pressure should be in accordance with the pressure setting of the piece number being used. (Common cut-out pressures are between 105-125 psi.) With the engine still running, make a series of brake applications to reduce the air pressure and observe at what pressure the governor cuts-in the compressor.
Instructions. Park the Impala on a level surface in the vicinity of a compressed air source. Remove each tire's valve cap. Press the tire pressure gauge into the valve of each tire to measure the pressure. Push the compressed air nozzle into the valve stem to inject air in any tire that is low.The suggested pressure for each tire is printed on the side of the tire.Release the compressed air after a few seconds and check the pressure again.nstructions. Park the Impala on a level surface in the vicinity of a compressed air source. Remove each tire's valve cap. Press the tire pressure gauge into the valve of each tire to measure the pressure. Push the compressed air nozzle into the valve stem to inject air in any tire that is low.