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

TEENCEE7

MEMBER
2005 CHEVROLET TRAILBLAZER
V6
2WD
AUTOMATIC
111,000 MILES

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.

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,513 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

Check out the images (below). Let us know what happens and please upload pictures or videos of the problem.

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