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Water Leaking Into Interior


pretty bad
Typical Repair Cost:
Average Mileage:
100,111 miles
Total Complaints:
7 complaints

Most Common Solutions:

  1. not sure (5 reports)
  2. fix hole in the firewall (1 reports)
  3. fixed windshield seal (1 reports)
2002 Pontiac Grand Prix body / paint problems

body / paint problem

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2002 Pontiac Grand Prix Owner Comments

problem #7

Oct 222010

Grand Prix GT V6

  • Automatic transmission
  • 150,000 miles


the water leakage on passenger side floor blew the blower motor... had to drive in a freak'n biggest snow storm of the year with no heat... end of story.

- , Windsor, ON, canada

problem #6

Nov 012010

Grand Prix LS 3.2L V6

  • Automatic transmission
  • 106,000 miles

it was raining outside really hard one day after I was in a class I came back out to the car and the drivers side floorboard was full of water, dealership claims they can't find the problem.

- , Emporia, KS, USA

problem #5

Oct 092008

Grand Prix SE 3.1L V6

  • Automatic transmission
  • 112,000 miles

Every time it would rain significantly, there would be inche of standing water in my floorboard. I asumed there was a hole in the firewall that I could not see, and I didn't know how the water was gettin in. It needed to be fixed immediately because it was leakig on electrical components. I noticed a slight upward bend in the windshield seal. So, I poured a bucket of water aroun the area and sure enough, that's where the water was gettin in at. I went to Dollar Tree and bought a small tube of adhesive and filled the hole. I haven't had the problem since, but it is only a temp fix and will still need to be repaired, but it's keeping the water out for now.

- , Charleston, SC, USA

problem #4

Mar 152009

Grand Prix GT 3.8L V6

  • Automatic transmission
  • 80,778 miles


Not sure where or how the water is getting in but I do notice that after a big rain the passenger floor is wet. Haven't bothered to get it looked at because half the people who I have talked to say that the problem is never found.

- , Guelph, Ontario, Canada

problem #3

Apr 012009

Grand Prix SE V6

  • Automatic transmission
  • 100,000 miles

This is the newest car I've ever had and I hate it! I can now add this problem to the overheating problem and the losing coolant problem and whatever the new recall problem is involving fire.It doesn't seem fair they can continue selling these pieces of crapp and not disclose any of this.I'm really questioning my loyalty to American cars . Thanks for listening....Cindy

- , Wichita, KS, USA

problem #2

Aug 072003

Grand Prix SE 3.1L

  • Automatic transmission
  • 52,000 miles

Every time it rained, the front passenger floor filled up with water. I had my mechanic investigate, and it turned out that there was a hole in the firewall. I had bought my car used, and this was an undisclosed problem. I never discovered how the hole got there, but the car was never wrecked according to its history. The repair worked, and the car has remained free of that problem for 5 years, though now I have other non-related mystery issues.

- , Hagerstown, MD, USA

problem #1

Jun 162007

(reported on)

Grand Prix GS V6

  • Automatic transmission
  • 100,000 miles

After having my car for 6 months, I started to notice when it rained hard, I'd go to my car and on the passenger side there would be a puddle covering the entire floor on the passenger side! I would have to shop-vac the floor and hope it dryed before the floor mildews or worse rust and eventually have a hole on that side! Now when I use the heater or AC I have a really annoying whistling sound and eventually the sound stops! I know this is messing up my electrical system but it's hard to get it looked at and find where the leak is until it rains! I love my car but damn I have a feeling it dont love me back! Anyone else have this problem and if so how did you fix it? Any info is greatly appreciated!

- , Burlington, IA, USA

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