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Where is expansion valve in 1990 chev k1500

duruser on Thu July 08, 2010 11:52 AM User is offline

Year: 1990
Make: chevrolet
Model: k1500
Engine Size: 5.7L
Refrigerant Type: R134
Country of Origin: United States

I want to replace the expansion valve in my 1990 k1500, but I am not able to find it. According to the Chevrolet C/K pickup Service Manual, it is located in the evaporator inlet line. I have removed the accumulator and disconnected the line that runs from the condenser to the evaporator inlet, but did not find the expansion valve. There does not appear to be any other place in the line between the condenser and the evaporator where the line can be opened.

My manual has the steps for the replacement of other AC components, but not the expansion valve. Can someone tell me where it is and how to replace it.


TRB on Thu July 08, 2010 12:24 PM User is offlineView users profile

Should be a condenser mounted orifice tube.


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GM Tech on Thu July 08, 2010 2:30 PM User is offline

condenser outlet behind right turn signal lense

The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......

Chick on Thu July 08, 2010 10:34 PM User is offlineView users profile

As stated, behind the right turn signal lens, remove the light and you'll see the fitting where it's in..

Email: Chick


Freedoms just another word for nothing left to lose

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