The original post is for a 2008 Suburban. Although these vehicles didn't come with a cabin air filter, one can be installed. Also, there is actually a technical service bulletin regarding how to install one.
Here are the directions. It will require a section of the air duct to be cut. The attached pics correlate with the directions.
2008 Chevy Truck Suburban 4WD V8-5.3L
A/C - Abnormal Dust Intrusion Into Vehicle Interior
Vehicle Heating and Air Conditioning Cabin Air Filter / Purifier Technical Service Bulletins A/C - Abnormal Dust Intrusion Into Vehicle Interior
A/C - ABNORMAL DUST INTRUSION INTO VEHICLE INTERIOR
# PI1216: Dust Intruding into Cabin Interior - (Apr 14, 2014)
Subject: Dust Intruding into Cabin Interior Models: 2007-2013 Cadillac Escalade EXT 2007-2014 Cadillac Escalade, Escalade ESV 2007-2013 Chevrolet Avalanche, Silverado 1500 2007-2014 Chevrolet Silverado 2500/3500, Suburban, Tahoe 2007-2013 GMC Sierra 1500 2007-2014 GMC Sierra 2500/3500, Yukon Models, Yukon XL Models Excluding Extended and Crew Cab Pickup (with RPO C67) Attention: Any changes or modifications to the vehicle should be first reviewed with the customer, and then noted on the repair order with customer approval. This is for customer satisfaction; this is not a warranty procedure.
Some customers may comment that dust is intruding into the cabin interior. If the vehicle is driven primarily in high dust conditions, it may be possible for some residual dust to enter the cabin of the truck through the fresh air intake in the plenum, then through the HVAC case.
At request of customer, install a cabin air filter following instructions below.
These vehicles did not come with a cabin air filter from the factory. First-time installation of the cabin air filter will require an installation kit. There are two different types of filter media offered; particulate or carbon/particulate. Refer to the part numbers listed in the Parts Information following the procedure below.
1. Locate and remove the screws holding the right side lower insulator panel as shown in the illustration. Refer to Instrument Panel Insulator Replacement in SI.
2. On the underside of the HVAC case, inboard of the blower motor, locate the groove (2) around the molded-in cabin air filter access panel (1) as shown in the illustration.
3. Carefully cut out the molded-in cabin air filter access panel using a suitable tool. Keep the tool inside the groove at all times.
The size of the opening is 10.25" x 1" (260.3 mm x 25.4 mm) as shown in the illustration.
Once the molded-in cabin filter access panel is removed, ensure the opening is free of burrs and debris.
4. Bend the top stage and slowly insert the cabin air filter into the HVAC module, with the filter stages (cut outs) facing inboard while the pull strip is pointed down as shown in the illustrated.
The cabin air filter MUST be flush with the HVAC module access opening as shown in the illustration.
5. Install the cabin air filter cover plate hook onto the slot in the HVAC module and press the cover flush while installing the fastener as shown in the illustration.
Tighten the fastener to 1.6 N.M (14 lb in).
I hope this helps.
Images (Click to enlarge)
Wednesday, August 12th, 2020 AT 10:19 PM