Greeting All,
Interesting post... I too am having the same problem with my "temp gauge" on my 64K10. Truck warms up, needle moves up and then swings all the way to the right. Have installed all new wiring harnesses (and a new temp sending unit from Chevy Duty, hmmmm...). I have also swapped out the gauge and tried again only to have that one "pegged" also. Then pulled the sending unit and removed the teflon tape, no change! I then installed a mechanical sending unit / gauge and it reads about 190 degrees (with 180 dg thermostat)after the truck is throughly warmed up. I checked with the local NAPA store and they are going to order me a new sending unit, cost is about $12. Hope to have it by this weekend, will let you know if it solves the problem.
64K10
