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2018 GMC Terrain
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37 Posts
Discussion Starter #1
I installed the OEM crossbars on the SLT a month ago to pick up the Christmas tree. I've noticed no difference in mpg's with them installed since then. Which is good, because they're kind of a pain to take on and off. Previous vehicle had a clamp style (very easy to install and remove) with a noticeable drop of about 5 mpg's on the highway.
So now you know!
 

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probably very little loss in MPGs.
You probably waste more fuel doing a few hard accelerations- or idling in the drive thru window
 

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On the wife's previous Trax the OEM cross rails did add some wind noise. I can't see how there would not be some added noise as air flow is being interrupted.
 

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2018 GMC Terrain
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Discussion Starter #5
No added wind noise. However, I do drive with my stereo on. Not “trying to go deaf, loud” but I enjoy the Bose system. Could be the added white noise system blocking it out to, not exactly certain how that all works.
 
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