I replaced a tension pully and belt to stop the screeching noise and it worked?

2005 CHEVROLET TRAILBLAZER
111,000 MILES • V6 • 2WD • AUTOMATIC
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TEENCEE7
  • MEMBER
  • 2 POSTS
yesterday i replaced a tension pully and belt to stop the screeching noise
and it worked. this morning i started the car and it started screeching again,
even louder. Well, as i was driving off it was acting like it was wanting to shut off
(turn off). i manage to keep it running with a little press on the accelerator. i turned
the car off at the gas station and when I started the car to leave, it was acting as if i was gently pressing the accelerator (also still screeching) it was like driving on its own. why? What does this mean? Why is it screeching again? i also wanted to mention that when i turn on the air or heat the car Shuts off. Can someone help me please? Thank you.
Sep 19, 2022 at 6:32 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,267 POSTS
Yep, stop driving it, it sounds like the A/C compressor is going out and it is trying to stop the engine from turning. if you take a quick video of the noise I can tell for sure. Remove the serpentine belt again and try to spin the clutch pulley by hand; it should turn smoothly with no noise. Here is how to change the compressor out just in case you need it. Here is a generic guide to help you see what you are in for and a video on how to vacuum down and recharge the system with instructions for your car in the images below.

https://www.2carpros.com/articles/replace-air-conditioner-compressor

and

https://youtu.be/4EqdrBVb0sY


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Sep 20, 2022 at 3:35 AM
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TEENCEE7
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This is what i have but since it is daytime i will go take another clip and hopefully you can see it better. thank you so much though.
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Oct 3, 2022 at 3:52 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,267 POSTS
Thanks for the videos, yep that is the A/C compressor that needs to be replaced. Let me know if you need anything else. I would not drive the car anymore.
Oct 4, 2022 at 5:40 AM
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