My Denali has 75,000 miles on it and the coolant light came on. I had my radiator flushed and filled by Jiffy Lube. I drove very little for a week, then went on a vacation. I went about 300 miles and stopped to get gas -- there was coolant all over the side of my car. I later discovered that the tranmission coolent line in my radiator had broken and my tranmission and radiator were swapping fluids. All my guages read normal!!! I had to get a new radiator and had my transmission flushed. I would like to know if this failure was caused by the flush and fill or if there have been other problems like this with the radiator? How can I discover whether or not it was as a result of the radiator flush and fill? Has anyone else experienced a similar problem?

I don't trust Jiffy Lube because it seems that the company allows fraud. Go to a radiator place to get the radiator flushed. It seems like the lines were not tighened or some other problem happened at Jiffy Lube.