Question about 2003 GMC Envoy

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Ac clutch on envoy does't stay engaged - 2003 GMC Envoy

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When the clutch kicks out prematurely, it's usually low in refrigerant. if the low side pressure gets too low, the low pressure cut out switch trips, turning off the compressor. Or it could be a bad cycling switch.

Posted on Nov 20, 2009

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How to reset 2004 gmc envoy after changing the thermostat my car stall when I turn on ac


Probably an AC compressor problem - if it is even partially seized, when the AC clutch engages that will stall the truck.

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A/C compressor is engaged even when turned off inside. battery also is being drained when car is not running.


Unplug the power lead from the AC compressor.If it stays locked up it a mechanical issue with the new Clutch. If it unlocks check the following. Look at the AC Relay. If it has fused or failed in the closed position the ac clutch will remain engaged. As I don't have the vehicle details I can't provide further details

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With ac off. compressor clutch and pulley seize causing belt to smell on 2002 gmc envoy


-Replace new one or remove it and use shorter belt.


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Why on a 05 impala the ac clutch stays on


You are either low or out of Freon.
The cars sensors is telling the motor it's not cold enough so it's staying on which can burn out the bearings if not taken care of ASAP.

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AC clutch only engages intermittently.


on the Ac system is a low pressure switch ,sounds like its faulty so fit a pull or flick switch from ignition supply and run this direct to the pump

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A/c compreesr cluth stays on but no cool air


You replaced the ac compressor, and the clutch stays on, but the compressor does not run ???
Not sure I am following your info here.
If the ac clutch stays engaged the compressor should be running. You should have one hot and one cold ac line and the radiator fan should be running.

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Hello 1989 Lincoln Town Car, AC Clutch not Staying


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02 envoy, 6 cyl, loud wooshing noise when engine is cold. fan clutch seems fully engaged. goes away when engine warms up. is this normal or does fan clutch need replaced


Fan clutches for Envoys and Trailblazer are a problem, they go out all the time.

However, it is normal for it to do this when cold, but will only stay engaged for maybe 15 seconds AFTER you've put it in gear and have started to drive. After this, it will disengage and allow the engine to warm up faster.

If you haven't already replaced the fan clutch once, you're lucky. 2002 is especially bad for the clutches, but all years don't last long. Mine lasted 90k which is pretty long.

Feb 26, 2011 | 2002 GMC Envoy

1 Answer

Clutch not working when temperature is high


You mean fan clutch? If so, check the wiring harness for frayed wires. These fan clutches for Envoys and Trailblazers tend to go out often. BUT, the more common problem is for the fan clutch to stay engaged, keeping the engine temperature too cool.

On another note, if you think 210 degrees is too high.....that's what it's supposed to run at, these engines run hot and should be dead on 210.

Feb 25, 2011 | 2004 GMC Envoy

1 Answer

Compressor will not engage



Look at the front of the ac compressor and have someone turn on the ac from inside the car. The front of the pulley(clutch) will spin when turned on.

If it does not spin, the low pressure switch (LPS) is not satisfied. Meaning there is not enough freon in the system to operate the system. Means low freon capicity because of a leak.

The LPS can be jumpered to cause the compressor to run (clutch to engaged) which will draw the freon in the system.

The LPS is usually a two wire sensor on the suction of the compressor. (between evaporator and compressor) Unplug the sensor and install a jumper, this will engage the clutch. Connect a new can of freon
and fill to system capacity.

The capacity of the ac system will be on a label under the hood, do not overfill. Probably about 2 lbs. Local parts stores (Auto Zone and Advance) will have freon with stop leak. This may help the leak. They also make a freon with a UV dye. I always add a single can with dye so that if stop leak does not work I can find the leak in the future.

The system should be filled until suction pressure is about 30 to 38 psi..

May 29, 2010 | 2006 GMC Envoy

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