AC Compresser noise

Discussion in 'General Chevy & GM Tech Questions' started by cliffdavis1, Jul 2, 2012.

  1. cliffdavis1

    cliffdavis1 New Member

    When I am between 1500 and 2000 RPM the ac compresser makes an awfull squealling/chattering noise and will break the belt if I don't either back off or accelerate past this range. I have broken three belts recently but otherwise the AC works great. 2003 Suburban 5.3 flex with 130K. Any ideas what to do to fix this? Cliff

    99'HEARTBEAT MODERATOR Staff Member 5+ Years ROTM Winner 1000 Posts Platinum Contributor

    From what you have mentioned.......Check the Tension-er for the A/C Belt, in the Diagram below, the A/C Belt Tension-er is Number #2....

  3. cliffdavis1

    cliffdavis1 New Member

    I've already replaced the tensioner, the spring was still good but the stop had been broken off.
  4. cliffdavis1

    cliffdavis1 New Member

    It sounds like the clutch is cycling on and off but only in this rpm range and if i stay in this range the belt will break. Or maybe its just the belt slipping but why?
    Last edited: Jul 3, 2012
  5. buzzkutt

    buzzkutt New Member

    What was the outcome on your truck?
  6. cliffdavis1

    cliffdavis1 New Member

    Bad compressor

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