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ls1nova71 · 01-09-2015, 03:03 PM

The fans are supposed to turn off at about 40mph if I remember correctly. You could put the truck up on jack stands and run it and see if they go off. But my bet is also it's in the tune.

01-09-2015, 03:03 PM	#40
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,118	Re: 6.0/4l80 first start The fans are supposed to turn off at about 40mph if I remember correctly. You could put the truck up on jack stands and run it and see if they go off. But my bet is also it's in the tune. __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html