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Tool Talk Discussion Board

Re: GMC /Chevy Truck Fan Speeds


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Posted by Inno on October 24, 2013 at 15:57:03 from (70.49.40.86):

In Reply to: GMC /Chevy Truck Fan Speeds posted by GUIDO on October 23, 2013 at 15:42:48:

Well even though it's a newer vehicle and the heater controls employ "logic" (a computer), you still have an analog switch and a resistor pack. Or is that an analog switch? No, looks like another darn control module! I'd go for the resistor pack first. Did the speeds go out one at a time or all at the same time? From what you describe it would seem that the resistor second from the right is open or intermittently open. Not sure if it's serviceable or if you have to replace as a unit. I love troubleshooting! Most people look at me funny when I say that but I have lots of business from the local classic car club when they run into something they can't handle.

This post was edited by Inno at 15:58:32 10/24/13 2 times.



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