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GMT 800 / 900 Cabin Air Filter Retro Kit GM/OEM parts

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Old 10-30-2014, 08:30 PM
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Post GMT 800 / 900 Cabin Air Filter Retro Kit GM/OEM parts

How to install GMT 800 - 900 chassis Cabin Air Filter Retro Fit Kit using GM/OEM parts

Complete this retrofit at your own risk, I am not responsible for any damage.

GMT 800's 2003+ (Notice possible conflict, check "L" bracket with dual filters on 2500/3500's) - (Older style - I have not done this to a GMT - 800 series try at your own risk)
GMT 900's All

UPDATE: DOES NOT FIT WT's on GMT 900's, the HVAC case is different.

If anyone finds issues or the parts conflict, please PM me ASAP, I will do my best to update this thread.

GM Part Numbers (GMT 900 series straight bracket)
22759208 - Retro Fit Kit (bracket & screw ONLY, no filter)
22759203 - Cabin Air Filter
23101674 - Cabin "Carbon" Air Filter
Only 1 type filter is needed

Dorman Retrofit Kit part number (GMT 900 series ONLY)
259-200 - standard filter w/ HVAC bracket & screw
259-201 - carbon filter w/ HVAC bracket & screw

GM Part Numbers early NBS's 1500/2500/3500 GMT 800 "L" bracket type (Older style)
52494070 - "L" Bracket Cabin Air Filter Cover (not sure if screw is included)
19257782 - Cabin "standard" air filter (QTY 2 half filters)
12489479 - Cabin "Carbon" air filter (QTY 2 half filters)
Only 1 type filter is needed

Notes/Maintenance :
Going forward replace cabin filter/s once a year.

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Retro fit kit top side bracket
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Retro fit kit Bottom side of bracket
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Carbon air filter (Notice the "V" cuts)
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Remove lower HVAC panel cover (3 screws, 1 under console is difficult 7mm magnetic bit works well)
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Before retro fit kit modification
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Remove blower motor resistor/regulator (allows for more wiggle room)
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Rear slot
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Score the plastic, repeat over and over shaving/thinning the plastic as you go (I was able to scrape most the plastic away using a 90 degree pick, only needed a razor blade to make a very lite cut afterwards) This material is very soft and doesnt take long to slice through from scoring it, just be patient and don't rush it
I would NOT recommend using a blade or razor when "first" scoring the plastic
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Air filter access, now cut away (Clean all debris and such)
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Carbon air filter (remember the "V" cuts, so we can install it, take note that the white pull tabs are on bottom)
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Checking alignment for good measure, don't forget to reinstall blower motor resistor/regulator.
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Retro fit kit and Carbon air filter installed
Don't over tighten the screw, there should be a small gap between the bracket and screw housing hole.
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I found it easier to start the 3rd screw that's under the center console from the drivers side
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Last edited by camcamaro1991; 01-26-2016 at 06:34 PM.
Old 10-30-2014, 11:57 PM
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Oh I adding that to mine it's always bugged me they got so cheap they deleted them.
Old 10-31-2014, 12:09 AM
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Yes sir, GM went cheap, its already nice not to see little dust particles go flying out the vents when I run the air. Looked into it a while back when I got the truck, but parts guys don't spend much time on us regular ol customers.

Since we are in TX, did you notice any reduced a/c odor. I always run my air on high for about 2 minutes before I get home to blow out the condensation as much as possible but it always seems to creep back every so often. It plagued us a Mercedes. Some clients would make me want to pass out when I test drove their vehicles, woof.

What other items did you add to your truck?
Old 10-31-2014, 06:22 AM
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You can add a cabin air filter to these trucks? Gotta call my parts guy to see what it runs
Old 11-03-2014, 11:58 AM
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THANK YOU! This is awesome. Canadian price on the kit is $44 counter price. Now if I can just get a supplier price this should be a fairly low cost upgrade

Old 03-10-2015, 03:29 PM
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nice write up Trevor, I think I'll try this in EXT.
Old 03-10-2015, 03:45 PM
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Wow didn't even know we had a cabin air filter on the these trucks
Old 03-10-2015, 05:00 PM
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I got mine ordered today, I've had this thread in the back of my mind since I saw it the first time. Total cost will be $58.02.
Old 03-10-2015, 06:41 PM
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Originally Posted by Three6GMC
Wow didn't even know we had a cabin air filter on the these trucks
Our (USA) trucks dont come with the cabin air filter. But its good to know that it can be done. I still havent done anything to mine but ill put one on there as it does like to throw dust at me at times lol.
Old 03-11-2015, 03:06 AM
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Yeah some good info to know I'll be doing this here soon.


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