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Old 10-27-2018, 07:47 PM   #1
Boog
laying low
 
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Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,014
2006 cooling fans

2006 GMC 5.3
all stock truck
OE dual electric fans

I noticed today the fans do not turn on unless the a/c is turned on. And they blow somewhat slow it seems. The truck has never overheated but I am curious why the fans don't come on with the a/c off. With it fully warmed it runs at 210*.
I am wondering how are these fans setup? Primary and secondary fans? Single or two speeds? How does one go about testing the fans and switches on this 2006?
In comparison my 2009 Yukon's fans blow like crazy.
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Boog
69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver
primer is finer
91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said.

I stand for the flag and kneel at the cross
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