Hello. Just joined. I have been a long time lurker gaining great advice. Now I need specific help.

My 01 Suburban 1500 has a leak. I noticed it this morning on the driveway after letting it sit all night. Please see picture. The area is underneath under the front passenger floorboard. It looks like water.

As a side note, I have lost coolant gradually where I have to add a pint once every couple weeks. I have had the system pressure tested showing no leak.

Thanks for your help!

here are is the pic...

 

Thats an O2 sensor. Look for anti-freeze leak above it.

 

that look's like the oxeygen on thye exhast pipe ,can it be dripping down on it from the ac evaporator drain ?

 

It looks like driver side, however OP says passenger side. If it were condinsation I'd think it would have evaporated especially on a hot exhaust. I'd suggest look at the fire wall heater hose leaking, as the OP also states he has to add anti-freeze.

 

Thanks for your replies. Here are a couple more pics to see where it is.






The tire in this pic is the front right passenger side.

So you do not think it is from the bolt that is wet in the picture but higher up?

 

Right now, that "bolt" could be the part of the firewall plenum for the heater core. That would also explain the coolent leak that you have to add to.

 

But its clear... it should be discolored by the anti-freeze you would think...
Is the AC running or the defrost been on so that it might be coming from the accumulator condensation?

Is is from the sunroof gutter drains?

 

Yes the liquid is clear. What is odd is that there has been no rain for at least 3 or 4 days. The pictures I took were in the morning and the last time the suburban was driven was at least 12 hours earlier for maybe 5 minutes. The drip was constant about every 10 to 20 seconds. Not sure about where the sunroof gutter drains are. But again no rain for several days.

I will look again when I get home from work.

 

feel it between your fingers. antifreeze often is not that green when in small drops.....
The feel of antifreeze is much more oily than simply water. just look down on your fire wall and feel with your fingers on the bottom of the heater hoses. likely it will be from there.

 

If its clear I would say its condensation dripping off the accumulator or coming out of the heater box from the evaporator from the a/c or even just having it on defrost.