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  1. N

    Vacuum for heater shutoff

    Does anyone know where the vacuum originates for the control valve for the heater water shutoff valve? I found the line and it went to the drivers side of the engine but couldn’t locate where it was connecte.
  2. N

    Harrison a/c compressor sensor

    I just replaced my compressor on my 99 Tahoe with a donor, but on the rear of the unit there is a sensor that is a different color than the one that was on the original unit. The donor had rear heat a/c, I don’t have. Will this affect the operation of the compressor?
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