Ok
Another update
Drove around, temp rose to 200+ went back home turned the truck off temperature held, waited like 15 seconds, restarted truck and immediately down to 180 and a little vibrating needle during idle
Did this again and same result
This is the 3rd gauge from the filling station and tired of changing these


1949 Chevrolet 3100 Suburban Carryall
"Bad Guy"
In the Stovebolt Gallery
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1950 Chevrolet 3100 3-Window
In the Stovebolt Gallery
More pix on Photobucket

1966 GMC Suburban Carryall Custom
"Big Guy"
In the Stovebolt Gallery
More pix on Photobucket