OK, I tried to search but am finding all different kinds of info. Figure I'd just ask and see what comes up. I have a 2005 Tahoe with 87k miles on it. It is pretty mint. I tow a flatbed trailer with cars on it, so I want to put a trans temp gauge in it so I can monitor it. I know the truck is wired from the factory to have the trans temp gauge installed, and I know I can swap in a 2500 gauge cluster and make it work. But I also know that GM gauges suck something horrible and I don't trust them. My gauges right now are mint and work perfectly, I do not want to swap them out of mess with them. I really want to install an Autometer trans temp gauge, but wondering if there is anywhere to put the sender without drilling the pan. Or maybe I can use the wiring for the factory installed sender? Any advice here?