Another update. I have driven the truck and had to deal with the occasional screech, christmas tree plus alarm a handful of times. Parts were in hand courtesy
@beno but had no time to tackle the job. today I had a day off from work so I dedicated all of about an hour and a half needed to fix this problem. Initially, i did not want to remove the master with fear of having to bleed brakes and other complications etc. I did some research on here and found a very good thread on the subject. While some have managed to have their mechanic replace the accumulator and pump motor without removing the master, I could not take that route. Unfortunately, I took no pictures but the job is pretty straight forward. I removed the brake hard lines, electrical connectors and a couple vacuum lines that were in the way. I then got under the dash and removed what seemed to be an electrical component right by the brake pedal, to make easy job of accessing the master cyl nuts. I then removed those, pulled the brake pedal pin and then removed the master cyl. With it on the bench, I was able to replace the accumulator and pump as one unit, just as I got it from
@beno. I connected the bypass hose and hard line to the new unit, screwed in the electrical connection, used a bunch of dielectric grease on those screws and then proceeded to install everything in reverse order. Once all done, i went for a test ride and the brakes are great. The screeching noise is gone and everything seems to work in order. Now, I have the old unit that I can give away to someone who would want to just get the replacement motor on
ebay and fix it and keep it s a spare, instead of paying full price for both the accumulator and motor as one unit. Apparentlu the motor is the one that goes bad and it can be independently replaced, with a cost of about $350. I could keep it, rebuild it and have it as a spare but I doubt I will need it again. I will box it and ship it to the first person who wants it and pays for shipping only. The unit is free..