cooling

When I start the truck both fans come on ( truck is cold and ac is NOT on). Then the fans go into hi after about 30 seconds. The relays are all good, the temp gauge at instrument panel seems to read accurately. When I turn the truck off the fans go off. Any ideas???

Hi, I have a 1998 Yukon 4x4 with rear a/c. Ever since I purchased it 11 years ago, the a/c has slowly been getting worse; And has always had a slight leak. It was tolerable until last year when the front and rear a/c started blowing hot air. This year, I added a little freon (it was...

I have a 1994 Yukon and ever since I got it I have had a rather weird problem. When I run the A/C, a/c does work to a point, the truck will heat up quick and keep going past the 210 degree mark when I am stopped or running the A/C in high and just doing normal around town driving. When I stopped...