Coolant loss '99 Yukon

[ManyCamaroz]

I took the Yukon in to check for coolant loss about 6 weeks ago. The dealer pressurized the system and there was no loss of pressure overnight. This ruled out a head gasket or intake gasket he stated. He replaced the radiator cap saying it showed some signs of leakage. Well. I've put about 1k miles on it since then and the level in the overflow jug is about 1" below the cold level. When I got it back it was just above the hot level after sitting overnight. No signs of leakage anywhere.

[mcreyaufmiller]

I would keep an eye on the oil to see if there is a mix. If not, I would go back to the IG. Mine only leaked when the motor was hot, never did it when cold. Don't know if this will help. Although, I replaced my IG and it still looses antifreeze. I just do not smell it anymore. Maybe it is time for a performance Intake with rerouted colant to fix the colant termination problem.

[99GMCZ71]

I also have a 99 Yukon that had a coolant leak. Changed the intake gaskets and no more coolant loss so far.

[ManyCamaroz]

I also have a 99 Yukon that had a coolant leak. Changed the intake gaskets and no more coolant loss so far.

 

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I had to repalce mine due to external leakage. was yuors external or internal?

[99GMCZ71]

I also have a 99 Yukon that had a coolant leak. Changed the intake gaskets and no more coolant loss so far.

 

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I had to repalce mine due to external leakage. was yuors external or internal?

 

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Internal