GMC Jimmy Repair Question
Asked on May 8, 2007
GMC Jimmy Losing Coolant through overflow tank
My V6 Jimmy , 1999, is losing coolant through the overflow tanks overflow tube. After a short drive, the coolant backs up and overflows. I have a new 16 lb radiator cap. I've noticed the coolant is very dark, almost black. It loses approx. 1/2 gallon each time. No other leaks. The oil is clean and clear. What could be causing this?
Asked by jims440