I have water leaking into my truck when it rains and also have a buddy that has a 04 CC like mine and his does it too,he took his into the dealer and they thought it was fixed buthe got it back and they hadn'tfixed it,we took the black cowl cover off ourselves but couldnt see where its leaking from,it drips from the emergancy brake pedal location and drips on the carpet then onto the floor. Has anyone else's HD crews have leaks?

Do you have roof marker lights? My 01 and 02 both leaked around the lights, a little black silicone and all was well.

We dont have the cab light's,my headliner has not been wet...

Does truck leak when driving on wet roads, or sitting?

Door seal could be damaged. Windshield seal... Check between winshield and hood (from top) and see if anything is outa wack.

If leaking while driving only; take a look in the wheel well area. Is there a plug in the floor area? I don't remember on mine, when its been on a hoist.

Just some ideas.

It leaks only when its sitting.

it drips from the parking brake pedal area on both trucks,there 04 Crew Cab's

Are you sure it is coming from the brake pedal area. Did you have a new windshield installed or was the one you have now got a crack close to the sealing area?
I would also look for any of the rubber/plastic plugs around that area.
I had an '84 Bronco II that took my a long time find a leak and it was the passenger side body mount where your feet go.
I might also be some condensation leaking from your air ducts.

Factory windshield and it leaks from the same area on both trucks .

is it wet in the back seat area also? I know some guys found the vent flappers in the rear of the cabs were missing.

Tom

Just wet on the front drivers area,on both trucks same area....I know its odd as heck... Has anyone else had a problem with your trucks leaking? Better check next time it rains.....

Could take some water and mix food colouring in. Take a small cup or something and start pouring in certain areas at a time. Don't do one big bucket full. Won't be able to narrow down where it is comming from.

Just a thought.

I wonder if others of us have this same problem, but don't know it yet, as we haven't been sitting in enough rain yet. . . yikes. . . that's a scary thought.

You need to take it in and have them check the drain tube over the drivers side. Sometimes it will get clogged up and cause it to leak into the cab and it will run out in the location you are talking about. At least that is what I have been told...

You're talking about the tube in the ventilation intake area? Just below the windshield?

Does it have a rubber flapper? I checked that out when we had the cowl off all was good and clear.

You need to take it in and have them check the drain tube over the drivers side. Sometimes it will get clogged up and cause it to leak into the cab and it will run out in the location you are talking about. At least that is what I have been told...
I was having the same problem but on the passenger's side clear back to the rear seats. To it to the dealer and they did the usual water running over the truck, but with no luck. I tried narrowing it down to rainy(driving and sitting). This was all going on during the summer months when the AC was on. It got a little to wet to where it started to smell and that's when I tooked it back in to get it checked again. Now by ACCIDENT they found that my drain tube for the AC was plugged and haven't had the problem since. At least I know that my marker lights, widow seals and doors are sealed tight.

So check you AC tube if you haven't already, just FYI.

I checked it and thats clear,its always on the drivers side drips down the emergancy brake and around the hood latch then onto the carpet or my catch-all mat...may have to take the fender off to find it....

So that mean that it has to be coming down the A pillar on the drivers side right? If it's dripping off the brake pedal then on to the "catch all" mat then it's you've narrowed down to coming from above and not from the wheel/fender area. I would seriously check the marker lights. There are some pretty big holes for the wiring for those things.

Try removing your pillar cover. Leave it off for a few days. Or hose the truck. See if any water is running down the inside of the pillar.

Another thought.... Try pushing on the inside of your windshield, out. See if the glass moves. Maybe the bead/seal around windshield is popped.

Another thought.... Try pushing on the inside of your windshield, out. See if the glass moves. Maybe the bead/seal around windshield is popped.
That is what I thought it might be since it is only leaking when the truck is standing still. When in motion the windshield might be pushed in to the truck and making the seal better. Just a thought.

Went to the truck this morning and I had a puddle in my catch-all mat,dripping from the emergancy break pedal,going to take a look at those things....

My truck doesnt have the cab lights,this leak is hard to pin point. exact same location on both trucks and his doesnt have the lights either..... Pay 40k on a truck that leaks water.... This is gettin old...

Is anyone else's truck leaking like ours are? If so could you tell me what the dealer done to fix it as we cant find the leak on out on our 04 Crew cabs

Silvermax,

I also have a '04 LB7 with the same leak that you describe. Driving me Censored NUTS !! Stealership is worthless, couldn't find a thing. I do have a crack on the passenger side, but hardly think this could cause this problem. Mine won't leak in the rain ( while driving ), in the carwash, or under a water hose. It leaks overnight from rain ( while sitting ) or from dew.:confused: I haven't had time yet, but I guess I will have to start tearing things apart to find the problem. What's really stupid is, it had no leaks during the 20" of rain we had over the last three days !! :eek:

Please post if you guys find the source of the leak, I'll do the same.

It's driving my buddy and I both crazy,let us know if you find a cure. Im sure there are some more trucks out there that has the same leak as we do...... Does your have the cab lights? My headliner has never been wet though,thats why I think its comming from the cowl area.

I just purchased 5 weeks ago, an '04 GMC CC SLE 4X4 Dmax w/Allison and I've had it outside in the rain and haven't noticed anything. Thanks. I'll keep an eye on it.

Ron
04 GMC Crew Cab SLE 4X4 Dmax w/Allison Silver Birch Mettalic
No mods yet.

When you do find water have you taken off the dash parts to look inside your air ducts also?
Do you use your air condioning unit when driving? Try not using it at all one day and see if the leak is still there. It could be condinsation building up in the air ducts.

Well my buddy thinks he has his fixed,rained all day and didnt get a drop inside,going up to his shop later and see if mine will be the same fix.

So what does your friend think it was?

Silvermax,
No, I don't have cab lights. I also think the leak is in the cowl area. I'm thinking of blowing some baby powder or something up in the dash area. Maybe I can find a trail from the source. Sorry for the delay in answering your question, I toasted a router the other day and waiting for a new one. I'm on dial-up now.-:t

I had the same problem with my truck too. It leaked right by the e-brake pedal, took it to the stealer and they did the water test nothing, as soon as i was backing out of the lot, water started leaking on my foot, so i stop got out and started smoothing out the weater stripping on the door and hasn't leaked since.

Hey everyone...I had my truck into the body shop about 3 months ago and was told by the service writer that there was a TSB or recall on my front bumper AND my windshield. I told him I knew about the bumper, but not the windshield and asked him what it was about. He said it was due to improperly sealed windshields.

Hopefully dmaxallitech can help us with that!

I don't know if it will be of any help but I watched a tech at a local shop pull a chunk of foam like spray foam or something out of the bottom of the drivers side pillar. He had to drill a hole to get at it and then drilled a hole through the bottom of the truck inside the pillar to drain the water. I know that probably is the right fix but the customer said just make it quit leaking on the floor. He did not diagnose were the water came from though.

Could the weatherstripping between the cab and door be folding under instead of folding up when the door is closed?

Tom :eek:

I have moved around the weather strip looking around the windsheild and I havent noticed it leaking since,hopefully it cured it...

Ok, what was the fix?

My 04 CC, no cab lites, just started doing the same thing about a month ago. Drips off the e-brake pedal.

No fix here, yet. Mine still leaks from time to time. I haven't had much time to check it out.

I thought I had mine fixed but its still leaking.... Cant seem to find it. Shouldnt have these problems with a truck this expensive....

I thought I had mine fixed but its still leaking.... Cant seem to find it. Shouldnt have these problems with a truck this expensive....
You're sure right on that one !!:mad:

Brining it back to the top.


It rained here yesterday and my truck was dripping off the e-brake pedal.

Anyone have a fix yet??

thanks, Al

I have the same leaking problem w/03 3500CC. Leaks only sitting still. Dealer has replaced windshield once and keep in rain booth for hours. Still leaking. I had windshield replaced due to crack and had installer put extra sealant on glaaa. It still leaks. This a factory problem and needs to be corrected. I had dealer clean carpets once already and will insist on total replacement if they can ever stop the leak.

Does your leak off the e brake? mine is still leaking,I think its comming from the cowl area.I may get a can of undercoating and spray the he** out of it in the cowl area near the driverside.

Got into my truck this morning in Tucson after a night of rain and I have the same leak in the area of the emergency brake.http://www.dieselplace.com/forum/images/smilies/censored.gif (Thought I might have had a leak for some time due to extra water on the floor when coming out of a movie or something, but the truck has been garaged every night until just a few weeks ago). The Husky Liner mat had probably 3 or 4 ounces of water in it and the carpet was wet where it meets the plastic panel outboard of the e-brake. Water has been dripping out of that area all day. Called the dealer and will take it in Tuesday AM. Has anyone gotten a good fix from a Chevrolet Service Department? If so, what was the cause? I'm certain that it won't get fixed based on the fact that it only leaks overnight when it's sitting in the rain.

Why don't you guys compare build dates..........

Maybe a run of trucks have this problem.......

Just a suggestion........

It will be on your Drivers Side door sticker.......

All CC's are built at the same plant.......EC's are built in a different plant.


T:cool: NY

Mine was born on 9/03....

07/03 for mine...

04/04 build mine leaks also

Lets keep this going, someone is sure to have a fix

9-04 for me.


I looked and looked, no luck. It drips right off the E-brake pedal, only when sitting. I do get a little pour from it when i take off, so it's gotta be puddleing somewheres.

Well, as I expected, the stealer was worthless at finding the leak in the e-brake area:( . Went armed with this thread and told them it was difficult to duplicate. After dumping water on it for over an hour and a half from all different angles - no leak!!! Guess we're all crazy; I must be imagining a leak:rolleyes: ! I'm camping in Tucson and it's supposed to rain until Monday, so I plan to take it in if it starts leaking. I did smooth out the seal before taking it in, so I may have somehow fixed it. Mine was built 2/04.

Left to their own devices, GM will end up putting in all new carpeting, just like they had to on my 96 Yukon when we got 20 inches of rain in less than 4 days in New Braunfels (I told theCensored it was leaking by the right rear door and they couldn't/wouldn't find it until it was a river coming through the poorly fitting seal!!!).
Rowdy

I have read some of the theads and looked for some help.
after 5 trips to the stealer we found the leak is coming from the wind shield then leaking down the piller.
they removed the windshiel resealed it and it has not leaked since.
hope this helps.

Just discovered the same leak in my 2004 CC build date 9/03 (dripping down from parking brake area after sitting still ie. parked overnite) Will make a trip to the dealer next week Sucks to have interior leakage in a 40K vehicle:help: l'll mention the windshield Thanks

My drivers side carpet under the rear seat was soaking wet after a rain. Only had it for a couple of weeks at that time. Discovered that they never installed the baffle on the backside of the cab on the drivers side! Had a gaping hole there! Unbelievable! Not the same as the e-brake issue but damn ridiculous for a 48k truck.

my drivers side door leaks on a heavy rain.. does it sitting, driving.. it dont matter.. going to the dealer this weekend and gonna have them take a look at it....

Haven't found mine yet,doesn't look like its the windsheild on mine...just my luck.

Mine leaks around the passenger side. Where the head liner meets the windshield. But only in a really hard rain or when washing. It didn't start leaking until the windshield cracked one day in 90+ degree weather. That was odd too, because the truck was parked when it cracked for no apparent reason.

I have an o4 cc also and am having the same problem. Leaks while sitting and just on the drivers side. The truck has been at the dealer for two days of water testing and they can't find it, but the lat rain left 1/2 gallon of water under the carpet.

hey guys
forgot to add, my 04 cc build date is May 04. I have not seen the water run down the ebrake, but rain is scheduled for this Friday. Dealer put water shower on for several hours. water is limited to driverside floor.

Thanks
for good input

I am new to this page and was looking for some help on this damn leaky roof in a 45k truck. I thought it was my onstar ant. at first but I belevie it is the windsheild now. My truck was built on the 10/03 and had not noticed the leak until about 6 months ago and have had the truck since 11/03. Thanks for the info, was hoping I was not the only one.

This is not a new problem for GM trucks. My brand new '99 Z-71 1500 leaked on the driver's side floor. Windshield had to be removed and resealed. Took them a couple of tries but they finally got it.

I having the same problem. I have a post in another site looking for answers. Unfortuanly it doesnt rain ofter in CA. When my leak first appeared, I had 40K on the truck. Three times to the dealer and they still havent found it, and are now telling me its not covered under warranty even with the extended warranty. It started raining on my way home today. I've had the plastic kick panels off since October so I can vent the carpet when it gets soaked. When I got home today, carpet was dry but the plastic plate all the way to the left was wet. Its dark and raining so I havent had a chance to remove it. I'll let you know how it progresses. PS my carpet now stinks from discovering the leak too late. Funny, buy a BMW you get the red carpet treatment. Spend the same on a truck, you get the shaft.

My 04.5 CC has also developed the dreaded "leak" I tore the dash apart, and noticed that the fuse panel is wet, it appears to be dripping from above, running down the fuses/relays (nice!!) and then pooling at the bottom of the dash, then once the pool is large enough, it spills onto the ebrake and drips down to the mat. I am going back out to tear some more appart, will report if I find anything. check your fuse panels and see if they have any moisture on them, there are two large circuit breakers that are paired, pull both and see if it is wet between them, mine was. Maybe we can find this problem and let the dealer network know.

O.K., I pulled the a pillar molding and I see visible drip tracks, also the foam was wet as well, difinetly coming from above. I pulled headliner back to check the onstar ant., everything is dry there. I think it is coming from around window. It is raing now, going to pull out of garage, park on level ground and see if I can get duplicate to happen. going to use baby powder on the a pillar molding to see if it actually does have tracks. Will keep posted.

I pulled four torx screws that holds molding on around windshield on drivers side, flooded with water both parked up hill, and down hill, turned wipers on, thought maybe it was throwing water somewhere, nothing.... I bolted everything back up and will check later. I definitly think that the water is coming in around windshield and pooling in a piller, then literally splashing into the dash, I could see visible signs of splashing on the fuse panel, wierd... I am afraid that if I take it to dealer that they will do what I have done, find nothing, and I will have wasted a full day. I will keep posted of findings. P.S. I am watching the screws that hold the molding on, I am wondering if water is running down the channel, then finding its way along the screw into the cab. Just a thought.

Did you ever find the leak? I have a '03 CC and am having a problem too. I havnt found the area for the leak but it just rained and I found it wet under the black plastic plate under the drivers side, carpet wasnt wet yet. GMC has looked at it 3 times now, first time "no problem found". Now I'm told its not covered under warranty, even though I have the extended warranty.

Mine is still leaking.... man this stinks on a 45k truck.

My 2002 CC leaks in the same spot. I noticed it for the first time back in December when all the rain started here in So Cal. I have looked but haven't found anything either.


Shawn

Well, after extensive and exhuastive research trying to replicate the leak, I have still not found anything. I drenched the thing with water, and nothing. Maybe it fixed itself, ha, ha... I will continue to research and will post if I find anything.

OK every one with the leake on the e brake you can try all day to make it leak but the problem is your windowshield the less pressure you puy on it (with water)the better chance you have of making it leak with a hose I had this problem removed all the plastic and you could never see were it leaks from because it is happening in the piller(not the plastic piece)the steel part.had evry thing out even most of the dash when it rained you could see the water coming out of the piller with a flash light and a small mirrow you could see it .

My leak has been solved!!! One of the guys in this thread said to check and align the weatherstripping at the front of the door and that's what I did. It appeared to have been crimped from the factory and still wants to go back to that position. It's obvious when looking at it how it seals the water out and how it's supposed to be aligned. We've had a lot of rain here in Arizona where I'm wintering and I haven't had any leaks since doing this. It's been outside every night and I've parked it uphill, downhill, leaning right, leaning left, etc. and the leak hasn't come back (I'm guessing at about a dozen rainy and heavy dew nights since taking it to the dealer). Others may have problems with the windshield, but this apparently has cured mine. I've been reluctant to pass this on until I was convinced the leak was gone.

Well I tried the align the weatherstripping method and mine is still leaking.....

hey red rock,


Any chance of posting a pic and showing what you aligned. Anyone else solve the problem also?

JH

My weather striping looks fine. The dealer said it was coming from inside the door leaking on the panel then to the floor (yea, right). Still leaks.

I got a chance to play with this again today. With the mat pulled back and the door closed, we ran water all around the door, door window and windshield. Where it would start to leak is on the drivers side bottom corner near the windshield. The sealant to the floor panel and the side of the truck is not good and water would come from it. Also water would "splash" out from the opening where the wires exit the cab and go to the drivers door. I just cant determine if its the windshield or area around it. My dealer said he'd look at it again under waranty, so its going back next week.

yours dripping off the e-brake pedal?


Mine was leaking like a sieve today, dripping off the e-brake pedal.

Yup I noticed this for the first time today also. Mine is leaking around the E-brake assembly too. What the dillyo?

so has there ever been a decision on where the leak comes from or how to fix it?

Noticed in last rain that leak was more severe.

Jeff

Katahdin,

Looks like your on the same quest. My ebrake is not dripping but if you pull the plastic panels off by the ebrake and pull up the carpet you can see where it comes in. Looks like most everyone is saying its the windshield. I'm getting terrible service from my dealer in Anaheim, but they agreed to look at it again so I'm gathering as much info as possible. I take it back on the 16th - they're too busy now. I think your on this thread too - http://www.dieselplace.com/forum/showthread.php?t=29241

OK guys, I have my dash trim off and I can see the drip, it's just below and a little right of the driver side air vent, looks like it's following a channel of some sorts from the right side, but I can't find where it's coming in from past that. It drips onto a cast aluminum webbed plate, and when one of the webs fills up, it spills over and follows down the e-brake brace.

I can tell you, it's diffently not a door leak on my truck, and I can't see it being from the windshield either.

I have the cowl screen and the wipers off, and I'm still looking.

Dealer replaced my windshield and it fixed the problem for me

Al in MI any other news on the leak?

Reel...is your leak still fixed with the new windshield?

I'm out of warranty, so I want to make sure before I invest in a new windshield. My repair guy said that more than likely, the windshield will crack when we try to take it off.

Katahdin

I'll throw my 2 cents in,my buddy fixed his by spraying undercoating all in the cowl area and let it dry real good before being in the rain,it stopped his. I was going to do this to mine but I adjusted the weather stripping around my doors and mine has seemed to stop. I would spray the cowling with undercoating before I spent the money on a windshield,it may stop your also.

Yes my leak was fixed with a replacement of the windshield.
The service manager told me the windshield needed resealing but they often break when being removed so he just had it replaced to begin with.

Hey silver,

Help me out...when you saying cowling area are we talking about the area under the windshield wipers below the windshield. Sorry for the rookie question.
jeff

Another suggestion for all:


Make sure all of the windows and door are rolled up and shut all the way. Turn the AC or heat on high and let the cab get some pressure behind it. Then take a bottle of soapy water and start high. I know that it maybe trying to find a needle in the hay stack but it works on tire leaks.

Yes Katahdin that is the area that I would spray with undercoating,it stopped my buddies from leaking.

Its not the windshield - for me. I got the dealer to cover it under "courtesy warranty" - yes I had to go to the service manager and dealer owner with unkind words. They had the truck for three weeks - they called me after the second week to tell me they couldnt even make it leak. The dealer totally sucks!. After going down and showing them, they removed the front driver fender to reveal poorly sealed door hinges. They actually contract this out to a leak finder vendor. Mine is fixed now. They removed the black cowl, which completely changed how water flowed into the truck. With it on, you could see water splashing into the cab with the interior driver side plastic removed and carpet pulled up. The passenger side does not exhibit the same problem. - Now all I have to do is convince GMC of poor manufacturing and get the stinky carpet replaced, and pay for my 3 week rental.