cab vent - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Boog** · 04-08-2021, 10:36 PM

Does anyone know how to remove that cab vent on the back wall of of the truck? The outer part is between the cab and front bed panel. I am chasing down a water leak. 2006 GMC crew cab.

**Boog** · 04-08-2021, 11:44 PM

I just found a few videos showing these vents are a well known source of water leaks on these trucks and how to replace them.

https://www.bing.com/videos/search?q...6FORM%3DVDRESM

I also have a water leak above the rear window. I replaced the 3rd brake light gasket and it appeared to have taken care of the leak so I went ahead and had the headliner replaced. Then after a couple of months I see water stains on the new liner from the same old leak. So I ran a real small bead of silicone around the light. Today I ran water over the top rear of the cab for 1/2 hour and saw no signs of leakage up there but both these cab vents are leaking.
Nice to see they can be replaced without removing the bed.

Another point of leakage on our trucks is found here.

https://www.bing.com/videos/search?q...AE9DF784CB89C2

**Boog** · 04-27-2021, 12:51 PM

I found replacements at Amazon. True GM parts at about $31 each. The rubber lip around the plastic vent just crumbled with age allowing water to trickle in and run under the carpet. I r&r’d it like in the video.

**hatzie** · 04-28-2021, 09:27 AM

Your carpet will dry on top but the jute underneath will stay wet and get moldy not to mention rusting out the floor.
You'll need to take it out and dry it on some sawhorses in the barn or garage. I usually blow a fan across it to speed up the drying process.
Laying it on sawhorses in the driveway in the sun will dry it out but it can shrink the carpet and jute.

04-08-2021, 10:36 PM	#1
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,534	cab vent Does anyone know how to remove that cab vent on the back wall of of the truck? The outer part is between the cab and front bed panel. I am chasing down a water leak. 2006 GMC crew cab. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross Last edited by Boog; 05-05-2021 at 06:38 AM.

04-08-2021, 11:44 PM	#2
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,534	Re: cab vent I just found a few videos showing these vents are a well known source of water leaks on these trucks and how to replace them. https://www.bing.com/videos/search?q...6FORM%3DVDRESM I also have a water leak above the rear window. I replaced the 3rd brake light gasket and it appeared to have taken care of the leak so I went ahead and had the headliner replaced. Then after a couple of months I see water stains on the new liner from the same old leak. So I ran a real small bead of silicone around the light. Today I ran water over the top rear of the cab for 1/2 hour and saw no signs of leakage up there but both these cab vents are leaking. Nice to see they can be replaced without removing the bed. Another point of leakage on our trucks is found here. https://www.bing.com/videos/search?q...AE9DF784CB89C2 __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross Last edited by Boog; 04-08-2021 at 11:58 PM.

04-27-2021, 12:51 PM	#3
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,534	Re: cab vent I found replacements at Amazon. True GM parts at about $31 each. The rubber lip around the plastic vent just crumbled with age allowing water to trickle in and run under the carpet. I r&r’d it like in the video. Attached Images __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

04-28-2021, 09:27 AM	#4
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,977	Re: cab vent Your carpet will dry on top but the jute underneath will stay wet and get moldy not to mention rusting out the floor. You'll need to take it out and dry it on some sawhorses in the barn or garage. I usually blow a fan across it to speed up the drying process. Laying it on sawhorses in the driveway in the sun will dry it out but it can shrink the carpet and jute. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.



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