2001 Chev Impala Master Cylinder has 2-Primary & 2-Secondary ports. I need to confirm which wheels each port should be routed to.

SOURCE: 94 S-10 Chev Brake problem

This is an easy fix un plug the abs sensor from spindle abs light will come on but the brakes will work only abs will not

SOURCE: primary and secondary brake shoe id on 1500 chev

Short shoe goes to the front, long to the rear.

Rob Sinbad

• 709 Answers
• Posted on Jul 25, 2009

SOURCE: 1994 Cavalier -replaced master cylinder-no pressure to rear brake

The most common bleeding procedure is to bleed the ABS brake furthest from the master cylinder first, then bleed the other brake that shares the same hydraulic circuit (which may be the other rear brake on a rear-wheel drive car, or the opposite front brake on a front-wheel drive car or minivan). After these have been bled, you then bleed the other brake circuit starting with the furthest brake from the master cylinder.
Air can be very difficult to remove from an ABS modulator assembly because of all the nooks and crannies inside the unit. The modulator may have eight to 10, or more, ABS/traction control solenoid valves, plus various check valves and dead-end ports. Some ABS modulators have special bleed screws to help you vent the trapped air when bleeding the system. Others do not and require the use of a scan tool to cycle the ABS solenoids while you bleed the system. 1. To bleed the isolation valves in the modulator, there are two bleeder screws. Start with the one toward the engine. Turn the ignition on and apply light pressure on the brake pedal. Open the bleeder screw and allow the fluid to flow until clear. Close the screw and do the same at the second bleeder screw. 2. Depressurize the accumulator by pumping the pedal 40 times with the key off. Wait about two minutes for the brake fluid to de-aerate, then refill the fluid reservoir with DOT 3 brake fluid. 3. Now you can bleed the boost section. This is done by applying moderate pressure on the brake pedal and turning the ignition on for three seconds, then off. Repeat this a total of 10 times. Make sure the pedal feels firm when you have finished, and give the car a road test to make sure the brakes are working properly.

SOURCE: Need to find Low Pressure A?C Port 2001 Impala 3.8

The low pressure port is against the fire wall, look straight back and you will see it.
Greg

SOURCE: service port

It seems that you have a leak, best bet is to bring it to someone with a set of gages to check the pressures while the ac system is operating. The high side should be about 150-200 psi and low side between 30-40psi with those numbers you should be running very cool. If its not that high then you most probably have a leak in the system most probably at one of the recently replaced parts or a new place, fill the system with a uv dye and recharge. drive for a week or two and check with a uv light.