Posted by Steve@Advance on July 30, 2016 at 20:18:18 from (107.203.134.67):
I recently bought a 2013 Silverado 1500. At only 40,000 miles, there is a strange air conditioner problem.
There is a leak "somewhere" that I can't find. It appears someone has been fighting this before me, it has dye in it, probably why they sold it...
But even when I add refrigerant, the pressures don't come in right. To get the high side up to where it needs to be, the low side is way high. This evening, at about 98-100*, engine revved up to 1500RPM, I added 12 oz. to get the high side up to around 300, the low side went up to 65! The cooling is minimal.
When I first bought it, I drove it on a cool day, around 85*. It worked well. But later discovered if it was warmer, mid 90s or above, it was slow to cool and only got slightly cool. A couple days ago, it rained on the way home, the air was basically just air, little cooling. I thought it must have lost the charge, but the next day, it was blowing cool again.
I suspect the leak is in the evaporator since I can't find any thing with the UV light. I also suspect it may have air in the system.
But then I found this article. Not sure if mine is equipped with this or not, but sure sounds like my symptoms.
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