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I have both PCM connectors 33 and 42 in place so my harness is not like you describe with the green ac trigger. I have
enabled both fans and it seems to work just fine now. I was asking for tune...

I used the Nelson harness for the 05+ oem fans. It is a 3 relay setup that has you add a wire to each of the
PCM connectors. I asked the tuner and he said its an issue with the operating system in...

I have a 2004 Silverado and replaced the 28" Radiator with a 34" unit and added the OEM electric fans
from a 2005+ Silverado. I then paid for a tune from an unnamed source that would activate them...