I'm assuming it's a good idea to unplug the power to the ECM when changing chips in a 93 LT1 and I was wondering if there is an easy way to do this without disconnecting the battery? Does one of the underhood fuses power the ecm or is there some other easy method to kill power to it?

Thanks for any help,
Rob

 

I don't remember how things are on a 93, but there's a PCM FUSE on 94+ cars for sure. I'll look when I get home, but I think there is one on a 93 as well. Last time I changed chips, I didn't unplug the battery though.