Today and yesterday were relatively hot days (approx 80 F, 24 C). When driving the Denali even short distances, it seemed like the under hood fan was blowing like a jet engine constantly. I don't seem to recall this before. The only thing different is that I have hooked up the towing wires for the 7 pin and trailer power to the fuse box (they come from factory not connected, so I found out).

It would not be that causing the fans to blow so much would it???!!! I am going to 3 hour highway trip tomorrow, and back, hope the fans blowing all the way is not a bad thing.

Have others had this issue? Tried turning A/C off to see if this would help but did not seem to. Bizarre.

 

sorry man not trying to hijack your thread but I gotta luagh at the 80* temperature problems your having. It was 107* here today.

 

I feel your pain

 

80*? Brutal weather man.

 

I really wonder why anyone lives up here. We probably get around 6 good weeks of weather in the June - August window. July is the only month where I have not seen snow, although snow in June or August is pretty rare.

But that is the pain of living in the Great White North.

107 - turn on the air! I guess that is kind of similar to when we are -40 in the winter. Instead of running from the warm house to the warmed car to the warm office building, you do the same but with A/C providing the comfort.

I chatted with my brother tonight, who has had a lot of 6.2 L through his fleet at work, and he recalls the fan running an awful lot as well. Must be a new GM thing, because I sure don't remember it running so much with my 6.0 L vehicles.

 

Is your engine coolant temp gauge working? When I installed my headers I knocked the plug for the engine coolant sensor loose from the head. My fans were doing the same thing.

 

I will check that out. Thanks very much for the tip.