2010 Terrain water leak - TerrainForum.net: GMC Terrain Forum
LinkBack Thread Tools
post #1 of 4 (permalink) Old 08-04-2019, 08:03 PM Thread Starter
Join Date: Aug 2019
Posts: 1
2010 Terrain water leak

Can anyone help? Looks like the leak is under the rear tail light and seeping in slowly (bad corner seals?). Also quite a bit of water under the spare tire that had made its way to the rear and front seat carpets. Can this be fixed or does it need to see a dealer or mechanic? Vehicle in great condition otherwise with less than 180k kms.
Elwood40 is offline  
Sponsored Links
post #2 of 4 (permalink) Old 08-04-2019, 08:37 PM
Theta Guru
Join Date: Feb 2011
Posts: 3,287
I don’t know how nimble you are, but I’d be popping off plastic panels and hopping in the back while someone sprays a hose in a very precise spot (*not* all over, as if washing).

Step 1 is determining where exactly the water is getting in.

2011 Equinox 1LT (new Jan 2011): Summit White / 3.0 L V6 / FWD / Pioneer Stereo / 18" Wheels / 138.2k miles [05-NOV-2019]

2002 Impala 1LT (new Jun 2002): Summit White / 3.4 L V6 / FWD / Cassette-CD Combo /225.5k miles [05-NOV-2019]
Colt Hero is offline  
post #3 of 4 (permalink) Old 08-05-2019, 08:20 AM
Theta GOD!
Join Date: Jan 2010
Posts: 9,703
Originally Posted by Elwood40 View Post
Can this be fixed or does it need to see a dealer or mechanic?

I don't believe that the dealer has any special fairy-dust that they can sprinkle on it to repair it. Follow Colt's advice and you certainly can fix it yourself.

2018 Equinox LT1 1.5 L 4 cyl, AWD, S/R Cajun Red Tintcoat/Black

2010 Equinox LTZ 2.4 L 4 cyl, FWD, S/R Cardinal Red/Black
RIT333 is offline  
Sponsored Links
post #4 of 4 (permalink) Old 08-08-2019, 12:23 PM
Join Date: Dec 2016
Posts: 2
I too had the same issue on my 2010 terrain. After a few days of rain I found 5-6 inches of water with my spare tire. After some digging I found out the rubber seals around the brake lights were bad. When you open your trunk/back gate, you’ll notice that the terrain’a design allows for water to come in from the top (crack of trunk/gate door) and run down over the brake light seals, then out the bottom. Yes, water is technically “suppose” to run into the car...?

My fix was pretty simple. Went to the auto parts store and purchased a small tube of ‘black silicone adhesive sealant’ and sealed up the tops and sides of the brake- light rubber seal.

I haven’t had a water leak since, but when the day comes that I have to change my brake light bulb, I’ll have to reseal again.
nardo is offline  

Quick Reply

Register Now

In order to be able to post messages on the TerrainForum.net: GMC Terrain Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome