Question about 2002 GMC Envoy
I just replaced my thermostat on my GMC Envoy with a 4.2 liter engine and now the fan clutch does not disengage. Could I have somehow messed up some other wiring like the temperature sensor that would cause the clutch to not disengage or does the fan clutch now need replaced again?
Kirkasmann, P1481 is most definitely your fan clutch, it's very common on our platform. Only wires to check is the connection on the drivers side shroud. You said replaced "again"?. I've had bad ones out of the box, or it would tick tick tick. Buy a lifetime warrantly fan clutch for this reason, plus it's easy to do (as long as you cut a notch in the top of the shroud where the upper radiator hose is).
Posted on Mar 07, 2018
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Posted on Jan 02, 2017
4.2L Engine the thermostat and the neck where the hose goes on is one unit $25 at autozone
Posted on Dec 29, 2008
It may be a bad low pressure cut out switch. You would have to hook the system to a set of gauges and look at the pressures. The low side should cut out at aprox.20 psi. if the switch is bad the compressor will keep running and ice up. The switch is easy to replace. It screws into the dryer (big silver can} it has two wires going to it. It's a cheep fix to try at home.
Posted on May 20, 2009
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