Question about 2004 Chevrolet TrailBlazer

1 Answer

What causes leaks under dashboard in Trailblazer during rain?

Only during rain, a good amount of water leaks into the cabin above the hood-release handle and to the right of the gas pedal. Starting to smell of mildew/mold. Any ideas for a resolve?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has achieved Level 3.

  • Chevrolet Master
  • 447 Answers

Crawl down there and watch with flashlight while someone sprays area from outside with hose.. when you see where the water is comning in fix it.. this is how a shop would determine where the leak is.. at about $100 an hour.. spray the water gentlly so you can see when it starts comning in. I would suspect windshield seal leak.

Posted on May 13, 2014

6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 405 Answers

SOURCE: water standing floor of 1991 corsica

That can be caused by the door or window seals. Around all your doors there is a rubber seal, this seal can degrade and allow water into the interior. There are also seals around the windows and front and rear windshields. If I were you I would visually inspect all the rubber seals on all your doors and windows, if any part of the seals is worn it should be replaced. You can buy universal weatherstripping kits off the shelf at any auto parts store to replace any of yours that are bad and it's pretty easy to install. You can also pick up a tube of silicone sealent to seal any small gaps or cracks in the existing seals.

Hope this helps

Posted on Feb 19, 2009

GM Elec
  • 1000 Answers

SOURCE: rain water enters car above foot pedal

Water is a tricky problem sometimes. If your A/C drain is plugged water can't drain from you air plenum you were looking into, so check the drain located below the heater motor and make certain no debris has blocked it.
Next, if the windshield sealer has deteriorated it can cause a leak. ( you haven't had the windshield replaced lately?).
The brake vacuum booster has a weather proof seal between the booster and the firewall, it may have deteriorated.
Anything that goes through the front of the dash should be suspect.
A good way to check is to use a garden hose and place it in particular spots and check inside for leaks. That way, you can narrow down the area that is leaking.
Good luck, let me know.

Posted on Mar 26, 2009

  • 3854 Answers

SOURCE: Gas smell when starting and small dripage when back up from under engine

It sounds like the return fuel line is leaking. There are two fuel line and one is the high pressure line which goes to the fuel pressure regulator then to the fuel rails. There is then a return line from the fuel rail to the gas tank.
With the amount of fuel leak, it's going to be the return line since it's not that bad compared to the high pressure side. Follow the fuel lines from the drivers side around the steering shaft to the engine. The high side and low side (return) run side by side and you should see it leaking when the engine is running.
Good luck and hope this helps.

Posted on May 25, 2009

  • 1 Answer

SOURCE: fluid leaking onto the front passenger side floorboards.

2004 TB 60,000 miles. i was just told that the leaking fluid in my passenger side floorboard was do to a clogged up A/c hose. An A/C works by drying/ removing the moisture from the air inside the vehicle and cooling it. The accumulated fluid is usually evacuated under the vehicle which is what you see when people are stopped at a red light and there is dripping under their car. when a hose is blocked there is a vent that from some reason flows directly into the passenger side floor board. If you can not manually knock loose the block your probably going to have to take it to a mechanic.

Posted on Jun 14, 2009

  • 22095 Answers

SOURCE: 97 chevy tahoe is leaking water during hard rains

a 3/8th hole will suffice so long as you remember to keep it clear,as for the build of these vehicles i have no idea ,sorry i live in spain so ask me about a seat or citreon and i recite it from memory

Posted on Dec 12, 2009

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Wet floor under drivers feet

A wet floor indicates one of two things; either rain water or coolant.

Press a paper towel into the wet spot on the floor / carpet. If colorless, it is likely rain water that has entered through an open window, an opening in the sealant between the windshield and the body opening for it or an opening in a seal between panels of the firewall.

If there is a green, pink or yellow tinted color, it is probably coolant. If it feels slippery between your fingers and has a "sweet" smell to it that further suggests that it is coolant. A check for lowered coolant level in the radiator / empty reservoir can all but seal the diagnosis.

The leaking rain water can be tough to find if the source is not immediately and plainly visible. If it is a coolant leak - it is probably coming from the heater core - as it is the only place coolant enters the cabin. The leak in the heater core *may* be able to be stopped by adding some of those "radiator stop leak" additives directly to a cold radiator. More often then not - the heater core will need to be replaced. The cost of this job can vary significantly based on the amount of labor required to gain access to the heater core itself (often it is buried up and behind the dashboard - requiring a large portion of it to be removed).

Below is the process for a 2003 Passat.

This is nearly always a job for a trusted mechanic. Good luck!

Jan 10, 2016 | 2006 Volkswagen Passat

1 Answer

Chev Impala Air ducting leaks water to the passinger side floor compartment when it rains

Open the hood, remove 2 plastic pins & cover just below the windshield on passenger side. There should be a preformed long rubber gasket that diverts any water away from the cabin filter (regularly replaced) found underneath in the compartment & sometimes the rubber becomes dislodged when changing the cabin filter.

May 22, 2013 | 2005 Chevrolet Impala

1 Answer

Leak onto floor behind the glove box, also making defrost slow to work.

i'm thinking this leak may actually be caused by a rusted out spot or hole on the hood of the vehilce, or by the windshield seal coming loose allowing water to enter..

if the cars antenna is above that area where the leak is it can also come from that..

basically it will enter the hood, run down the sides and gather on the floor under the glove compartment...

you said its only when its raining right ?? so its definitely a leak.

Dec 30, 2012 | Cars & Trucks

1 Answer

During rain, water makes it inside the cabin behind the driver side. Where could it come from?

the floor pan plug under the carpet is either broken or fell out! or leaking look under the vehicle and find the hole and see if the plug is there

Jan 20, 2010 | 2002 BMW 3 Series

3 Answers

Water leaks driver side floor

very good chance that it is the heater core that is leaking into the car ,doubtful that this is a job you can do yourself as the dash -or most of it has to come out "youdoit"

Nov 01, 2009 | 2001 Mitsubishi Eclipse

1 Answer

Water leaking into car from behind the glove box.

look under hood on the fire wall on the side of the leak see if you can see where it is coming in

May 22, 2009 | 2000 Plymouth Grand Voyager

2 Answers

2003 Impala leaks

There could be water filling in the HVAC intake located in front of the winshield. The drains may be clogged and not releasing rain water. Unfortunately the only way to resolve this problem is removing the entire dashboard and accessing the inner core of the HVAC system.

Nov 27, 2008 | 2003 Chevrolet Impala

Not finding what you are looking for?
2004 Chevrolet TrailBlazer Logo

90 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

74896 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7688 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides