floor getting wet in 99 suburban - The 1947 - Present Chevrolet & GMC Truck Message Board Network

shaneschevys · 08-18-2010, 09:27 AM

My father in law recently bought a 99 suburban and the passenger floor is getting wet. I changed the heater core and it didnt stop it. When the truck sits with the a/c on it doesnt leave alot of condensation. We have not got much rain here lately so I know it cant be leaking from the rain. Is it possible for the condensation from the a/c to be leaking into the floor? I cant find any evidence of this. Any help would be appreciated.

danomano · 08-18-2010, 09:30 AM

Yes the drain hole could be blocked.

clinebarger · 08-18-2010, 09:34 AM

Check to see if the drain for the evaporator is clear. Its right below the heater hoses on the firewall. On a humid day like today it should drip alot of water with the A/C on.

shaneschevys · 08-18-2010, 09:41 AM

Quote:

Originally Posted by clinebarger

Check to see if the drain for the evaporator is clear. Its right below the heater hoses on the firewall. On a humid day like today it should drip alot of water with the A/C on.

It does drip some but not like it should. The rubber elbow was missing from the drain so I rigged a short piece of hose to replace it. I will call him and get him to check it to see if it is clogged up.

sparkydog · 08-18-2010, 10:30 AM

Another possibility is that the cowl drain is blocked on the pass side. This is supposed to dump water out the firewall and into the void between the fender and the wheel skirt. If it blocks up enough then you can get a little lake going up in your cowl and this will spill into the HVAC blower intake and the leak off the bottom of the blower and onto the pass floor.

MattA · 08-19-2010, 09:10 PM

You probably fixed it with the hose. Without a drain elbow the condensation will drain right back into the cab on these trucks.

Cooper33 · 10-08-2011, 04:37 PM

have any pics? i have the same problem with 2007 tahoe.

08-18-2010, 09:27 AM	#1
shaneschevys Its always something! Join Date: Aug 2005 Location: FT Worth,TX Posts: 4,992	floor getting wet in 99 suburban My father in law recently bought a 99 suburban and the passenger floor is getting wet. I changed the heater core and it didnt stop it. When the truck sits with the a/c on it doesnt leave alot of condensation. We have not got much rain here lately so I know it cant be leaking from the rain. Is it possible for the condensation from the a/c to be leaking into the floor? I cant find any evidence of this. Any help would be appreciated. __________________ 79 p10 stepvan 72 Short Fleetside 72 Suburban 67 GMC One Ton Flatbed 64 Short Fleetside 57 Chevy 2DR Hard Top 57 Chevy 2dr wagon 65 f* short fleet 63 C 60 Flatbed Member of the patina club**

08-18-2010, 09:30 AM	#2
danomano Registered User Join Date: Dec 2007 Location: Austin,Texas Posts: 146	Re: floor getting wet in 99 suburban Yes the drain hole could be blocked.

08-18-2010, 09:34 AM	#3
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: floor getting wet in 99 suburban Check to see if the drain for the evaporator is clear. Its right below the heater hoses on the firewall. On a humid day like today it should drip alot of water with the A/C on.

08-18-2010, 10:30 AM	#5
sparkydog Registered User Join Date: Feb 2010 Location: Fallbrook, CA Posts: 910	Re: floor getting wet in 99 suburban Another possibility is that the cowl drain is blocked on the pass side. This is supposed to dump water out the firewall and into the void between the fender and the wheel skirt. If it blocks up enough then you can get a little lake going up in your cowl and this will spill into the HVAC blower intake and the leak off the bottom of the blower and onto the pass floor. __________________ Balls and a Sawzall Project Halfbreed Porsche 944 L67V6 CARB Legal & Other Stuff

08-19-2010, 09:10 PM	#6
MattA Registered User Join Date: Jul 2003 Location: Plano Posts: 83	Re: floor getting wet in 99 suburban You probably fixed it with the hose. Without a drain elbow the condensation will drain right back into the cab on these trucks.

10-08-2011, 04:37 PM	#7
Cooper33 Registered User Join Date: Feb 2011 Location: Round Rock, TX Posts: 125	Re: floor getting wet in 99 suburban have any pics? i have the same problem with 2007 tahoe. __________________ Brad 67 Chevy SWB stepside - http://67-72chevytrucks.com/vboard/s...d.php?t=449426 89 Ford Bronco 92 Suzuki Sidekick 94 Kawasaki Vulcan 750 06 Honda Aquatrax



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.