Where is my coolant going?

[Donnie Yukonie]

The heater core control valve (passenger side between firewall and fender well underneath intake box). That valve cracked for me and the only way I could tell it was leaking was to inspect the frame rail which had some unusual rust spots. The valve costs about $12 and should be replaced anyway while the intake is removed. Good luck.

x2

This is what happened to mine when I had a mystery leak

 

[Goodinblack]

A Big X1000 on replacement of the intake gaskets ASAP.

Bearings WILL suffer.

I caught mine just in time before the bearings got hurt.

It is NOT hard to do. If I can do it on a van through the dog house.... it is a easy thing on a SUV.

I had this issue on the 1996 Tahoe and a 2001 Chevrolet Express 3500.

From my CB Radio.