Mystery of the GM OEM Rear Air Deflector - Page 6 - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2006 - 2009 TrailBlazer SS Tech > 06-09 SS Appearance > Exterior

Exterior Exterior repairs/modifications

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  #51  
Old 04-04-2011, 11:53 AM
itpphoto's Avatar
itpphoto itpphoto is offline
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2008 Chevy TrailBlazer SS
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I would say it helps slightly, you can notice there is no rain on the window when you are traveling along at highway speeds and it's raining.

I did post pictures of the new style earlier in the post,

Frank
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  #52  
Old 04-18-2011, 02:14 PM
3ssMM 3ssMM is offline
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Does this thing make any wind noise?
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  #53  
Old 04-18-2011, 05:30 PM
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itpphoto itpphoto is offline
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I have not noticed any wind noise at all.

Frank
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  #54  
Old 04-21-2011, 01:35 PM
3ssMM 3ssMM is offline
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Hum IDK looks like an afterthought. Maybe it will grow on me... I just don't know.
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  #55  
Old 02-08-2012, 01:32 AM
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You all remember the deflectors on the back of vans and station wagons in the 70's. This is the same deal, most people think of them only as a way to keep the rear window clean, but another factor is MPG. By "filling" the vacuum that is normally left behing the moving truck, the pressure differnece is reduce, front to back, and hence drag is reduced and MPG could increase.
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  #56  
Old 02-07-2013, 04:17 PM
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I think I've seen the EXT version of the old OEM rear air deflector number 12497618 in my town.. I have to check if I am correct

It could be nice on mine...
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  #57  
Old 01-17-2014, 11:41 AM
Shiloh41 Shiloh41 is offline
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Rear Air Deflector

I Have a new Gm 12497618 in the box. Bought for my 2002 Trailblazer in 3/2002. Never installed it. If you live in Charlotte area and are interested, contact me at [email protected].

Quote:
Originally Posted by SportinLS2 View Post
Guys, I spent a great deal of effort resolving some of this mystery, so I thought I'd share the information I have after finding and installing one.

The GM Rear Air Deflector shown on the "accessories" web page DOES exist (Part #12497618), but is no longer recognized by their Parts Department.


This item has been discontinued and the replacement part number (17800651) is the flat blade of transparent smoked plastic with a dent along the one edge to REVEAL the third brake light in the OEM location.


See this thread for more info :https://forums.trailvoy.com/showthrea...flector&page=5

There are some good installed pictures of both (Page 2 - new) (Page 5 - old)

Once I found the old part number (12497618), I called several dealers until I found one still setting on the shelf. They were glad to sell it (free shipping)

ANYWAY here are some details on how this thing installs:

First it is molded to closely match the third brake light applicade and comes with a plug to RELOCATE the third brake light reflector.


The instructions are very easy to follow and walk you through the REMOVAL of the OEM reflector and RELOCATION on the deflector arms and plugging the orignal reflector hole.


COMPLETED PHOTOS

HATCH CLOSED


HATCH OPEN


The integration of the OEM reflector INTO the rear air deflector really disguises this aftermarket modification and would easily pass any vehicle inspection.

As far an "functional", it does an incrediable job of reducing the amount of "road spray". Even at city speeds (<30mph) virtually no mist accumulates on the rear window. This greatly contributes to a cleaner rear end. No dust, so no need for washer fluid that eliminates mud trails down the gate.

For what it's worth I am very pleased with this mod but be prepared to do a lot of footwork yourself. My dealership wouldn't even help locate the part. They can't order it anymore and that was that...

BTW: Sorry for the pictures. It is winter here and my truck in embarrasing dirty all the time.
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