Question about 1995 GMC Sierra C1500

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Leaking antifreeze fluid from under the engine.

My truck is leaking antifreeze fluid from under the engine. I can't see where it's coming from when looking under the hood. But when I look under the engine from the ground I can see it leaking from the passenger side of the engine.


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  • mike loshbough
    mike loshbough May 11, 2010

    have you ever replaced the intake gasket if the water pump was leaking it would be in the front of the motor.



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Most likely leaking from the water pump which will need to be replaced


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Posted on Feb 01, 2009


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SOURCE: Leaking antifreeze fluid from under the engine.

might be a freeze plug leaking, or heater hose. there are three freeze plugs on each side of engine and two in back of engine. most likely if any of them are leaking, it will be the one behind the starter on the far right rear of engine block. they have also been known to leak around the front and rear of intake, where intake, head, and block meet.

Posted on Feb 01, 2009

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get a paper towel and dry these areas then start engine. when it starts leaking that will tell you if you need to change the water pump (gasket leak or weep hole shaftseal leak) or if you just need to replace/repair heater hose.

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Hi Sarah,

I assume that you meant to say "harmonic balancer".
The first thing you need to keep in mind when it comes to fluid leaks is that they ALWAYS run downhill. The leak could be originating from several different places depending on WHICH ENGINE your Impala is equipped with. (This is really need-to-know information if you would like help with with your car - especially when we are talking about an engine problem.)
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I would check the heater core. You can rent a pressure tester from the auto
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Also check to be sure that the
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1 Answer

Leaking antifreeze fluid from under the engine.

might be a freeze plug leaking, or heater hose. there are three freeze plugs on each side of engine and two in back of engine. most likely if any of them are leaking, it will be the one behind the starter on the far right rear of engine block. they have also been known to leak around the front and rear of intake, where intake, head, and block meet.

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