Coolant or antifreeze leak

Tiny
AMANDA DOWNEY
  • MEMBER
  • 2001 GMC SAFARI
  • V6
  • 4WD
  • AUTOMATIC
  • 250,000 MILES
All my coolant leaked out under my driver's side next to my gas tank. It's leaking really bad, how do I fix it or can any tell me what parts I need to buy?
Tuesday, May 21st, 2019 AT 4:42 PM

4 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Hi Amanda,

Can you try to get a few pictures of where you are finding it? It sounds like you are finding it in the rear of the vehicle by the fuel tank or more towards the front?

If it is behind the engine, I imagine your rear HVAC system is the issue, or at least the cooling hoses running to the rear heater core (assuming you have a rear HVAC system which it appears you do).

Let's start with the pictures of the area and we can go from there. Thanks
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Tuesday, May 21st, 2019 AT 5:25 PM
Tiny
AMANDA DOWNEY
  • MEMBER
  • 3 POSTS
Here's a video:
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Tuesday, May 21st, 2019 AT 5:26 PM
Tiny
AMANDA DOWNEY
  • MEMBER
  • 3 POSTS
And a picture:
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Tuesday, May 21st, 2019 AT 5:26 PM
Tiny
KASEKENNY
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  • 18,907 POSTS
That is great. I just want to make sure I am seeing what you are seeing. I posted a picture of your video and circled what appears to be a small stream of coolant?

If this is the case, then that is a heater core line that has rusted through. This carries coolant to the rear heater core and will require replacement. As you can see that entire line is very dark and rusty. You could try and seal it but this will not repair it long term because even if you get it stopped, it will just rust through somewhere else.

Can you get a picture a little further back so I can better orient myself? Or you can just go down to the local parts store and have them look at the line. They can identify which one it is and then look it up for you.

I can then get you the procedure on how to replace it if you would like.

Either way, I will assist with what you need but that line needs replaced. Thanks
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Tuesday, May 21st, 2019 AT 5:32 PM

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