I have an '01 8.1L K2500 Suburban that is losing coolant somewhere. I've checked the oil and tranny fluids and found nothing that looks ominous. I've had it in to a Chevrolet dealership 2x for this issue. The first time they replaced a valve and tee connector somewhere in the heater core. The second time I had it in, they couldn't found anything leaking. They pressure tested the system and the pressure cap. I don't smell antifreeze in the cabin when running the heater. I do smell antifreeze on occasion when I walk around the front of the truck. I'm driving about 120 miles a day on my daily commute with this thing and need to know where the coolant is going (yeah, I KNOW ABOUT THE GAS MILEAGE!!). I don't want another car payment and don't have the money for a new car right now, so leave me alone! ;-)

Seriously, if anyone has any ideas, I'm open to them. Neither myself nor American Chevrolet in Muncie, IN has any...

Thanks in advance!

 

I have a 01, 5.3 Tahoe and went thru reading all about different coolant issues....
It ended up the cap on the tank tested ok, but replacing it solved my problem...
Good luck