Question about 1995 Pontiac Bonneville

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1995 bonneville water problems

Water leaks into the backseat floorboards. Can't find out where it comes from.

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I had a similar (and maddening) problem with my 1994 Bonneville SSEI. Try the following!

First,check the roof drains from the moon roof. The drains on the Bonneville from 1992 until 1999 are often and easily plugged. This simple check can be properly accomplished by first opening the moon roof, secondly finding the front drains (usually near the four corners of the moon roof) and third using low pressure compressed air to "gently" clear them. After clearing, you can check proper drainage by the drains by pouring a bottle or two of water directly into the drains and then looking beneath the car for the water that was drained.

Secondly, check the quality of the drain hoses from the moonroof. You can find them by carefully removing the plastic covers on each side of the the inside windshield pillars. Check out the hoses for proper connection and that they remain in good shape. The moon roof drain hoses can sometimes become disconnected or even disintegrate with age to the point that they leak.

Third, check the door seals and make sure that they are properly functioning. This can usually be accomplished by making sure the seals are not torn and ascertaining if the seals are properly secured to the door jams with adhesive. If not, reinforce the adhesive with additional adhesive.

Posted on Nov 19, 2008

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Check fender wells mine had rusted through even with undercoating

Posted on Aug 26, 2009

Check windshield for broken seal. push w/shield out from inside edges and corners and you will see it lift. use w/shield sealer or urethane to seal. silicone hardley works.

Posted on Aug 05, 2008

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