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2002 yukon denali AC ISSUES

I have had my 2002 GMC Denali to the mechanic 4 different times for my a/c. The A?C button stopped engaging, blinks three times then it doesnt work. I was told it was my dryer, that was replaced. Then I was told my ambient temp sensor was frozen at 32 degrees and would work properly. That was replaced and then it worked fine for 45 days. The weather started getting cooler. 4 days in a row it would not work in the morning. Took it back to the mechanic, they reset my computer, worked for 4 more days. Then started blowing warm but, the a/c but was working. Brought it back again ! They said I was low on refrigerant. Worked for 7 more days and now the same issue again. When they filled my refrigerant the had it all day and said the entire electrical system was working properly, How can I fix this ?

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Try changing the switch that maybe the simple solution

Posted on Jan 03, 2014

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Posted on Jan 02, 2017

  • 184 Answers

SOURCE: Yukon Denali Fuel Trim bank One and Two running too lean?

Could also be fuel filter, pressure, vacuum leak, etc. Check these two articles out, they should help too - http://www.obd-codes.com/p0171 and http://www.obd-codes.com/p0174

Posted on Dec 21, 2008

  • 102 Answers

SOURCE: Need color codes for radio in 2002 gmc yukon denali

2002 GMC Yukon Car Stereo Wiring Guide
Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Brown
Car Stereo Dimmer Wire: Gray
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

Posted on May 24, 2009

  • 5495 Answers

SOURCE: 97 Olds Aurora AC blowing warm air a day after recharging system

Several- The system should hold freon for years without leaking. There are pressure switches and they cut off the compressor with an undercharge and an overcharge. You need guages to measure the charge. There are testers the A/C shops have called "sniffers" which can detect a leak. If you have no leak then you need a technician to add or remove freon to get the concentration right. Or you need guages.

Posted on Jun 12, 2009

  • 1 Answer

SOURCE: 2005 yukon denali, a/c worked fine until battery died

Turn ignition switch ON then OFF then depress and release gas pedal 5 times to reset the computer. Worked for me.

Posted on Jul 28, 2009

  • 1015 Answers

SOURCE: 2006 GMC Yukon Denali XL Rear Hatch & Glass locks not working

Could be the latch mechanism for the door is sticking. You could try using some white grease on the latch and the contact where the latch hooks to. You can purchase the grease from most auto parts stores. You will not need to use alot. Just apply a small amount to the mechanisim and then work it in using the manual handle. Then open and close the door several times to feel the "action". Then apply a little more and repeat. This should loosen the latch and get it working again. Also make sure that none of the tension springs have come loose on the latch. And check the seal around the door and make sure it is not pinched and has a proper fit.

Posted on Dec 29, 2009

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