Trenton oliver
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2017 gmc sierra 1500 5.3 6 speed and 75 and just driving normally trucks all stock put a new transmission in last may. When new transmission went I put a new updated thermostat in
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So out of nowhere today i decided to look at my trans temp and it was at 230 degrees and went up to 240 then cooled down. I was wondering before i take it to a shop to get anything done. What could be causing this it’s still shifting smooth has butter with no issues.
