Antifreeze leaking with no overheating

[rn4l21]

‘01 Tahoe, 207K miles - The low coolant light came on so I let it sit while I ran and got some. Came back to this leak. No check engine light and no overheating. Any ideas what to check first?


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[Scottydoggs]

if thats under the firewall id think its a heater hose leaking.

 

[00'BlueSteel]

Maybe one of the lines from the radiator to the rear hvac unit. The puddle in the photo does look a little far back to be water pump or any fitting up front.


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[HiHoeSilver]

Agreed. Check on those damn T fittings at the firewall.

 

[Doubeleive]

yep it's mostly on the right side which is where the t-connectors are for the heater core and rear heat on the firewall

 

[Coatwolf]

Part number for the T’s if u need them. Dorman 800-414 and 800-413. If you need the other part that comes off T it’s gates 28500

 

[rn4l21]

Checked my heater hose fittings and they’re good. What should I check next? Thanks for the help so far.


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[Coatwolf]

Head Gasket?.... Any coolant on your oil dip stick ---hope not...

 

[Doubeleive]

A leak that bad is probably a hose, get under there with a flashlight and take a good look sometimes the hose will only leak under pressure, take it for a spin then get under it right away after

 

[Coatwolf]

Yep. True. Mine would only leak after I shut the engine off. Very minimal amount.