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2000 Sierra Intermittent AC
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Question
Javabear
My 2000 Sierra 1500 SLT 2WD 5.3 has intermittent AC issues. Sometimes it works great all day, sometimes it works for 10 minutes and drops out, and sometimes it doesn't work at all. The blower always works and changes speeds like it is supposed to. I thought maybe compressor relay or dash control and have changed both with no improvement. I think the blend actuators are jacked up as well because I don't get any airflow out of the defrost vents when I turn it to defrost. The only other thing that I have noticed is that the display in the rear view mirror is also intermittent. Sometimes it works, usually it doesn't. There doesn't seem to be any correlation between that and the AC working or not working. I'm thinking BCM but I'm guessing at this point. Does anyone have any other ideas?
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