Question about 1999 Pontiac Grand Prix

3 Answers

2000 grand prix leaking on drivers side floor board

Every time it rains hard my drivers side floor board gets soaked. I took my car to a body shop and they couldnt seem to find the problem. Any ideas? If so much appreciated.

Posted by on

3 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

My daughter had a similar problem and a local dealer 'unclogged' a drain that runs from the sun room down each (left & right) pillar to the front wheel well. No problem since. Hope that helps.

Posted on Nov 03, 2008

Sell the car if will only get worse from here. I have had nothing but trouble from my 1999 grand prix. Will never own another Pontiac

Posted on Nov 03, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I have a 99 Grand Prix that had the same problem. There is a rubber gasket that has probably come loose that is under the plastic air inlet grille. This grille is up against the windshield and the wiper go through mine in my 1999. Remove this grille and you should see a water deflector that has come loose. Use some silcone to secure it back in place and that should stop the water problem.

Posted on Dec 16, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

2 Answers

2004 nissan sentra rain leak passenger side


Someone in the car watching for leak, someone outside the car with a hose.. Gently apply water to the door area and person inside looks for the leak... Another possibilty. If the water is comning from under the car it can be a rusted place or a body separaion.. harder to find. It can be comning in from around the windheild seal and running down the interior firewall. This is how a shop would find the leak.. but they would charge you for it..

May 16, 2014 | 2004 Nissan Sentra

1 Answer

1999 Pontiac Grand prix does not blow high fan speed on Max A/C.


if its the same set up as my oldsmobile intrigue there is a plug behind the glove box that has a sensor board, my fan quit working all together and I swapped that sensor out and everything worked fine afterwards, does your right side passenger floor board get wet when it rains hard, if so it has shorted part of the sensor out for the high side of the fan.

Sep 11, 2013 | 1999 Pontiac Grand Prix

2 Answers

Water leak driver floor board


A water leak under the dash could be the heater leaking near the glove box, or a windshield leak, or sometimes the drain tube for that area has gotten plugged up and needs to be cleared out. Most times a little blast of air pressure will do it.
Hope this helps.

Aug 05, 2013 | Oldsmobile Cars & Trucks

1 Answer

Drive side soaked floor boards.


Could be a plugged drain for the windshield or cowl vents, or the door gasket.
You could try using a garden hose or take it to a body shop.

Jan 11, 2013 | 1997 Ford Crown Victoria

1 Answer

2004 rear drivers floor board is wet


Sounds like the door gasket or trunk gasket is not sealing.
You may have to take it to a body shop to find the problem.

Jan 07, 2013 | 2004 Toyota Corolla

3 Answers

Water on floor passenger side after it rains and after air has been running 2000 grand prix


Ac hose leak?
leaking heater core?

Hint: it leaks when it RAINS

If it were related to the heater core or the AC drain, it would be leaking when it is not raining also, so those diagnoses are not logical.

The grand prix has a long history of floor leaks from seal failures around the air intake under the windshield cowling, where RAIN water runs in.

May 04, 2011 | 2000 Pontiac Grand Prix

1 Answer

My lexus 2000 rx300 started to leak water I find. It's only on the floor, water on the drivers side carpet ater it rains. Yesterday after a hard rain there was standing water on the floor. It seemed the...


I am guessing that you recently had a windshield replaced. If so they didn't seal it well and it leaks in there. You can go to a glass shop and have it re-sealed or you can buy sealer at most automotive stores and do it yourself.

The other option is that it is leaking in through the air intake between your hood and the windshield. That is the air intake for your heating and air conditioning. There are drains in the line that can get clogged up. If that is the case the best option is to take it to a repair shop.

Jan 31, 2011 | 1999 Lexus Gs 300

2 Answers

95 grand am quad 4. water on floor boards?


might be a heater core leak coming through the vent system.

thats just first thing that comes to mind.

Mar 17, 2009 | 1995 Pontiac Grand Am

2 Answers

1998 grand cherokee drivers floor keeps getting soaked


first, when I read your post I remembered that if the ac drain hose (small hose stub on the engine side of the firewall, usually on the passenger side) gets plugged this can happen. If that doesnt fix it, get a friend to spray with a hose and start looking for where the water is entering the cabin. Leaks are a real pain to find, even for shops, so don't get discouraged if it takes a while to beat this!

Dec 13, 2008 | 1998 Jeep Grand Cherokee

Not finding what you are looking for?
1999 Pontiac Grand Prix Logo

482 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts

yadayada
yadayada

Level 3 Expert

61037 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

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

Answer questions

Manuals & User Guides

Loading...