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My ambient air temperature doesn’t change sometimes. It will stay at the mornings temp instead of increase with the day. Does that affect anything?
 

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2016 Chevy 2500HD LTZ custom sport
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508 Posts
Mine works great but in the winter I know when I started putting a piece of insulation covering my trans cooler in the front lower bumper hole my temp gauge for outside is all mess up shows it is +20 out when it is like -20 to -30 out. But soon as I take that piece out it is back working bang on. 🤔
 

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If you are scanning the IAT then it is important that it give a reasonable reading but if you are just looking at the A/C then it hardly matters except it may affect the way the heater works.
 
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