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Im at the end of my rope with this truck. 2021 Sierra 5.3L Evolution with Active Aero Shutters.

I work out of my truck and it idles a lot. When the temp drops to below 60f outdoors it closes my shutters, but when it warms back up they wont open. It was 80F yesterday and I let the truck rev at 4000rpm and nothing. I have to drive my truck down the highway to get them to open.

While they are closed Both of my cooling fans are on and I get 0 A/C. It was 90 degrees in my truck yesterday and getting close to that today.

1- Why was this stupid system made? Its the worst idea I have ever seen

2 How do I get rid of this without it showing a check engine light? 

Lifters already failed on this truck. Im at 45k miles. Ready to set the thing on fire at this point. Please help.

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I would like to see that data on the fuel economy with those stupid shutters. Worst idea I think I have ever seen.

Who buys a truck for fuel economy? This truck has spent 4 weeks at the dealership so far. I have only owned it for 10 months. Every time it goes in I have to get a rental (Usually happens to be a Ford) and I have to pay out of pocket. I purchased this truck to be a "work truck" without all the extra sensors. At this point I'm going Ford Shopping Saturday while my truck is back at the dealership again... Can anyone suggest a way to delete that system and not have the check engine light come on?

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Its not people buying trucks for fuel economy, its EPA fuel regulations they have to meet.  If they can gain 1 mpg better with them, thats all they need.


As for Ford shopping, they have the same shutters as GM, and also have issues.  Let the service dept figure it out, its not normal operation.

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