Question about 1989 Chevrolet C1500

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1989 Chevy Silverado 1500 A/C is making a loud rattling noise.

The output on the a/c is full cold air, yet it is making a very loud rattling noise that gets worse each day. I can't figure out what is causing this noise. Any help would be appreciated here.

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  • 201 Answers

Yes time for a new ac pump it is wore out. Sorry for the bad news but the ac pumps dont cost that much.

Posted on May 16, 2014

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Posted on Jan 02, 2017

emissionwiz
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SOURCE: 99 Chevy Malibu belt chirping noise problem.

one or more of the pulley's is defective, most likely the tensioner pulley, but check them all for wear and side to side movement which indicates a worn bearing, this causes the belt to not run true and chirp.

Posted on Apr 09, 2009

  • 149 Answers

SOURCE: Rumbling & grinding under front end

Watch out! You might have a loose wheel! Check those wheel nuts. If not, a loose brake caliper, or last if not least, a bad wheel bearing. Don't drive it until you find out what the heck is wrong! Could be dangerous.

Posted on Jul 06, 2009

  • 1 Answer

SOURCE: 2000 Chevy Silverado 1500 The heater does not

Had the same thing happen to my truck, the blen door actuator is under the console on passenger side, but the heater core is going to be clogged if you dont have any heat coming through, but a/c works..

Posted on Oct 06, 2009

  • 2841 Answers

SOURCE: 1989 chevy silverado heater blowes cold air. both

Feel the hoses going into the heater on the firewall. If one is hot and the other is cool, then the heater control valve is not working for whatever reason. Check the flow valve.

Posted on Nov 07, 2009

  • 41 Answers

SOURCE: Tapping noise near computer 1994 Chevy 1500 Silverado

air recir actuator motor shorted you can reach between blower motor and heater case and unplug a pain to replace

Posted on Nov 29, 2009

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1 Answer

A/C making a rattling noise


I'm assuming that your '89 Chevy has the C6 compressor, which utilizes teflon sleeves for the internal pistons. The teflon sleeves wear out, and the small pistons slap inside their chambers, making a sound like marbles in a can. Eventually, the compressor will seize.

They're fairly expensive compressors, so brace yourself!

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