2005 Silverado Crew Cab Windshield fogging over.

[luweee]

My 05 Silverado with 76,000 miles and a new windshield installed last spring has developed a problem. I am noticing in the last month/beginning of September that when I first get in the vehicle that fog develops on the windshield .. i need to run the defroster to get rid of it. HMMMMM

 

Can anyone tell me what going on?

 

Is it possible this applies to the '05's

 

debo511, on Feb 7 2011, 02:38 PM, said:

Subject: Excessive Cabin Moisture/Reduced Window Clearing
Models:
2010-2011 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2010-2011 GMC Sierra, Yukon, Yukon XL
With RPO C67 or CJ3
Manual Hvac System
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
CONDITION/CONCERN:
In rare cases, some customers may comment of excessive cabin moisture or difficulty keeping the
windows clear in low ambient temperatures.
RECOMMENDATION/INSTRUCTIONS:
If normal diagnostics do not lead to a correction, inspect the HVAC recirculation door by lowering the
glove box. The door should be in the "Fresh Air" position, which closes off the recirculation opening
behind the glove box when the HVAC controls are in the floor to defrost position. If not, then follow
the procedure below:
1. Turn the vehicle ON.
2. Set the HVAC controls to a Vent/Panel position.
3. Press the Recirculation button on the control head.
4. Move the HVAC controls back to a Floor / Defrost position
5. Verify the Recirculation door has moved to the Fresh Air position by visual inspection.
6. Return the vehicle back to the owner and instruction them NOT to use the recirculation button and
that Engineering is working on a software update.
7. If the vehicle returns with this concern and the recirculation door is again in the recirculation
position then Contact GM Technical Assistance.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition
exhibited is resolved without completing every step, the remaining steps do not need to be
performed.

[luweee]

Oh by the way.... when I get out on the open highway especially on windy days (wind in my face) I hear a horrible noise from over under the glove box. like air is coming into the cabin somehow. maybe a door half open splitting the wind???? this make sense to anyone??

[Carder09]

This is normal in temperate climate. High humidity or not, the inside of your vehicle may differ from the outside temp. This, and your body heat, will cause the windows to fog up on the inside. Outside fog is outside weather. As for the glove box thing, I don't know what to tell you except that I think the blower motor gets some air from the front window sill tray??? Could be your wind noise.

[luweee]

Carder I would agree with u ... But it's just not acting normal... Had this vehicle 5 years but just not the same.

[CapitalTruck]

Did you check the door behind the glovebox?

[ifixedit]

You mentioned you put a new windshield in it last spring, I would suspect the seal around the windshield, probably at the bottom somewhere on the passenger side has failed and is now letting in outside air. Back in the mid 1980's (years ago!) I worked for a nationally known auto glass place and once in awhile we'd get one that would come back with this problem, so it's not too uncommon. The tech who installed it just might have put the sealant a little too low or too high in one spot on the cowl and the new windshield just didn't make good contact with the sealant which now days is Urethane dispensed from a caulk gun. Sure would at least explain the noise part you are hearing. I'd check with whomever did the work and find out if they will warrant it, if you went through your insurance company let them know what's going on and they will get on the glass company to fix it. Auto glass companies will usually bend over backwards to keep the insurance company happy as they probably get 80% of their business through them vs. just regular walk in business.