Question about 1996 GMC Sierra

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Air condition problems with 1996 gmc sierra 1500

Air condition throws cold air when driving long distance, but hot air when at lights or stopped.

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Istall a varable displacment orifice tube. at almost any auto parts store

Posted on Jun 23, 2009

  • davidworley Jun 25, 2009

    also chech fan clutch at radiator to see it is pull a lot of air to cool a/c condenser

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Can you feel the compressor turn on. there maybe a small leak that has caused the freon to leak. you can recharge and see if this works. I suggest using a leak kit to make sure it is not slwly leaking

Posted on Jun 22, 2009

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Related Questions:

1 Answer

My 2003 sierra is blowing hot air on drivers side and cold on passenger side how do i fix


Sounds like one of the blend doors is stuck or not working. Try and pinpoint the door by playing with the controls. May need to purchase a actuator, the part that powers the door to open and close,

Aug 03, 2014 | 2003 GMC Sierra 1500

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My GMC Sierra's air conditioning works great but the driver side vents will spontaneousely start blasting out hot air. The passenger side continuse to blow cold air. If iI turn the truck off and...


  1. Air conditioner system is discharged. Have the system evacuated, charged and leak tested by an MVAC certified technician, utilizing approved recovery/recycling equipment. Repair as necessary.
  2. Air conditioner compressor clutch not engaging. Check compressor clutch wiring, electrical connections and compressor clutch, and repair or replace as necessary.

May 24, 2011 | 2005 GMC Sierra

1 Answer

I have a cold air leak on the passenger side of my 2004 GMC Sierra 1500. Where is the air coming from and how do I stop it?


Some of these pickups would develop an air leak between the air inlet section of the HVAC box and the cowl or firewall area. This leak would allow cold air to seep into the cab [usually by the passengers feet] in the winter and hot air in the summer. The other rarer cause I've seen is the recirculation door actuator motor sometimes won't hold the recirculation door closed which can also cause a leak. Sorry but I don't have a procedure to fix either of these for you as the ones I saw were still under warranty and went back to the dealers. Hope this helps narrow it down and good luck!

Dec 20, 2010 | 2004 GMC Sierra 1500 Crew Cab

2 Answers

2005 GMC Sierra 1500 - heater blows, but only cold air


Check coolant level. Check for heat at the heater hose going from water pump to heater core at firewall. Check to see that cable is moving coolant control valve from the closed to open position. Low mileage so it shouldn't be plugged heater core.

Jan 07, 2010 | 2005 GMC Sierra

1 Answer

2000 gmc sierra 1500 5.3 v8. a/c heater control problem


your heat/cool and vent selection options are controlled by engine vacuum through small clear tubes attached to the rear of your climate control interface. Other vehicles have small steel pull wires that operate the desired changes. You might try removing the trim and any fasteners affiliated with the interface/console. GENTLY pull outward and look to see if any of these tubes are pulled off or cut/damaged. Did anyone recently install a new stereo in the vehicle? If so, the vacuum tubing and or pull wires that change your outlets could have been damaged when the stereo unit was pushed into place. Hope this helps

Sep 09, 2009 | 2000 GMC Sierra

1 Answer

Air conditioning gets hot when stopped , fine as long as driving


The refrigerant may be low, also could be that the a/c compressor is going out. Have it checked

May 09, 2009 | 1996 Chevrolet Cavalier

1 Answer

GMC Sierra A/C Stops Cooling After Driving a Few Minutes


It sounds like you either have an condensor fan problem or low freon. The condensor fan is near the radiator. In some cases the radiator fan doubles as the condensor fan. So look there too.

May 09, 2009 | 1991 GMC Sierra

1 Answer

No Heat


You need to verify the blend door is operating and the heater core is not plugged or coolant flow to it is restricted.

Oct 29, 2008 | 1993 GMC Sierra

1 Answer

1999 gmc 1500 sierra truck v8


The clutch in compressor is controlled by a pressure switch. Start there.

Jun 25, 2008 | 1999 GMC Suburban

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