On my 14 GMC the dash gauge reacts very slowly and you really can not get an accurate temp. However if you scroll though the dic you can bring up a digital temp with real time #s.
I also have a Mini max that displays trans temp as well. The 2 almost always are with in 1 degree.
Normal temp, who knows. Is it 95 out or 20. Are you towing or not ?
I have seen temps as high as 225 while pulling up a long grade.
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2018 Chevy 3500 LTZ Dually Diesel 4x4 CCLB
2011 Montana 3455 SA. 6 point level up. Disc brakes. Curt Q24 Hitch. 5 step glow steps
Progressive EMS. Valterra tank valves. Sailun G637 tires. ARP fridge control. All led lighting. Mor Ryde IS
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