So I apologize if I havent searched the right key words, both within the forum and on google I know someone has already had to have asked this question.
I have a 2000 Gm LM7 pcm from both a GMC Sierra and a 2000 Chevy Tahoe. My DD is the 00' Sierra but the 42? fan output and the recirc door output pin has decided to supply ground at all times with key off(battery voltage of 12.47v thru that pin and its bleeding roughly~6.7v on the recirc door pin(just enough to activate the relay for the low speed fans on the 3 relay circuit)on both the blue and red connectors) and sets my fans on full blast at random times, (to the point I went out into my driveway at 2am with a shotgun thinking someone was stealing my truck.) and that my battery obv was drawn down completely.
so my question is: how do I copy/paste my sierra tune into my spare tahoe pcm that I have? ( I verified that pcm does not supply ground to the fan control pins for the fan output and the recirc door output, however obv with the vats/ different VIN it shut things down quick, which I expected, nbd.
I guess the boiled down Question is: do I need to spend another $100 to license the "new" pcm or can I somehow just control C/V to make a computer copy of my current pcm with its vats/vin/current parameters onto my spare lm7 5.3 tahoe PCM? and if i need to spend the $100 it is what it is, but then, how do I go about it?
I already fear that it isnt that simple but I just need my fans to work as commanded by the pcm, even for winter, georgia needs cooling fans in december and this is a work truck, I DD it and I tow/ lock into 4low regularly.