240 vs 260 temperature gauge

[mxer147]

Is the signal automatically calibrated for the installed gauge? I’m considering switching instrument clusters, the cluster installed currently has a gauge 100-240F, the other I’m considering installing is 100-260F. The remaining gauges are the identical to each other, except the temperature gauge.

 

[75gmck25]

Simple answer - maybe.

What is the source for the new gauge? GM changed the gauges over the years, and each year or range of years uses a slightly different sending unit. For example, my ‘75 sending unit would be very unlikely to provide an accurate reading of temp on your truck.

Take a look at parts numbers on RockAuto.com and see if the two gauges use the same sending unit. If not, it’s usually easy to swap to a sender that works with the new gauge.

 

[mxer147]

The source was a 1985 K10, my truck 1983, but not sure if those are original since it’s Frankentruck. I’ll run it to see if it’s running same temperature as other gauge. Thank you for the response.

 

[Snoots]

The sensor should follow/match the gauge. If you change gauges, get the sensor that it was attached to.