1999 - 2006 (GMT800) Section for all discussion related to the 1999-2006 Chevrolet and GMC trucks.

2000 silverado 2500 A/C

Old Jul 18, 2019 | 1:31 PM
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From: Benbrook Tx.
Exclamation 2000 silverado 2500 A/C

does any one have a copy of a/c wiring diagram with the values of each wire the ohms and volts or is that possible . I'm thinking I'll trace each wire from switch to compressor until I find what's wrong .

Last edited by 1jimbo; Jul 18, 2019 at 1:36 PM.
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Old Jul 18, 2019 | 2:28 PM
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Originally Posted by 1jimbo
does any one have a copy of a/c wiring diagram with the values of each wire the ohms and volts or is that possible . I'm thinking I'll trace each wire from switch to compressor until I find what's wrong .
You check A/C pressures yet?
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Old Jul 18, 2019 | 2:52 PM
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had to check the pressures when I recharged it gauges read 55 low- 225 hi should surley be in range to operate
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Old Jul 20, 2019 | 12:36 PM
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Originally Posted by 1jimbo
had to check the pressures when I recharged it gauges read 55 low- 225 hi should surley be in range to operate
Actually, that's on the high side of R-134 ideal system pressures. There is a possibility that Atmo got into the system? N-Ox can increase pressures.

The old R-12's would be ideal at 30-35 low and 150-160 PSI high. R-134A is ideal at around 40-45 low side and 170-185 on the high side. It's possible
that you may have too much pressure, or the gauge set is inaccurate. if you don't have at least 45 F at the outlets, something is amiss. I always get
38 to 42 F at the outlets when I am done. Even converting old R-12 systems over to R-134A, I have gotten less then 45 F degrees at the outlets.
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