The latest info.....I bought a handheld temp gun (cool!) and measured the operating temps....I thought maybe the sending unit was bad so I replaced it....Same results, temp gauge starts to slowly creep up as car warms up and the jumps to the top....Maybe a wiring issue? So I took another gauge and wired it to ground and new temp sensor....YEP, you guessed it, PEGGED to the top too.....So what could be causing this?? Any ideas???