AC question

2003 CHEVROLET AVALANCHE
4WD • AUTOMATIC
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BRENTULRICH88
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  • 42 POSTS
Not getting cool air out of my AC. I did have a new compressor installed within last few years, but seems like that is what is not engaging. You’ll hear the sound in the video. I have the A/C on high mode with recirculate on. This was also happening when I was charging it thinking that was the issue.
Sep 18, 2026 at 5:32 PM
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MECHTRIX
  • Experienced Mechanic
  • 451 POSTS
Sounds like its trying to engage but its hard to tell ...its best if you look at the acual belt pully and see if the inner portion of the pully turns when that sound is made ..if it does than the clutch is working and the pump Is most likely ok ...thats said this clicking sound usually accures when the pump start to cycle on and off due to low refrigerent either due to it leaking or not enough was added but yeah thats usually the case if the pulley is at least engaging for a second or trying to ..you can try adding a bit more refrigerent with the car running a d see if the clicking on and off gets father in between clicks if it does then add a bit more till the pulley is just engaged all the time youl basically hear the clicks get less and less frequent until they compleatly stop ..then stop youre good there .. hope this helps
Sep 18, 2026 at 6:51 PM
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BRENTULRICH88
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  • 42 POSTS
It does. I just keep getting nervous on the recharge because the pressure was creeping in the yellow/red. But not sure how much to trust those lol.
Sep 18, 2026 at 6:53 PM
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MECHTRIX
  • Experienced Mechanic
  • 451 POSTS
Just incase heres the specs for your car (standard) is
Pag 46 oil 8oz but 8f you have ac in the back also it 11oz.
And as for the refrigerant (standard ) is
R134a 26 oz.
Bit if it has ac in the back of the car also the its 36oz ..Just figure out how much is allready in the sytem and if it lacking any just add that amount good luck
Sep 18, 2026 at 7:03 PM
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