I want to post a followup to my problem before this thread gets too stale. ![]() BTW, the tank that I just had removed is the new style, and was installed in the car in 2011. If this part happens to be part of the problem, it would have been nice if GM had decided to sell it separately from the tank assembly. The “sensorâ€, or at least the piece that the electrical plug connects to, detaches quite easily once the tank is out of the car. So I guess that means that there’s a small piece of plastic somewhere in my cooling system. One interesting observation: The plastic tab indicating the High fill level is broken off. I kept the old tank so that I could do some investigating. I’ve driven through several warmup/stop/restart cycles, which would have triggered the warning light before. The new tank has been in the car for almost two weeks now and the problem has not resurfaced. They installed a new tank and upper hoses. They found no problem with the connection. ![]() I ended up having my tech (an official Saab service center) replace the tank, with the request that they also check the electrical connection to the sensor. Any help from the group will be appreciated. I realize that there could be internal leaks or tiny leaks where the coolant evaporates before forming drops, but neither of those explanations seem to fit what I've said above (no loss of coolant when measured consistantly.) I will gladly replace the tank if that's what it takes. What database or site is available to get the service info? I looked at GM and they don't list Saab anymore on the dropdown to register as an owner. Is it possible that the electrical connection for the sensor is bad, loose or corroded?Ĥ. Is there a diagram of the float/sensor in the tank, or has anyone cut open an old one? I'd be curious to see it.ģ. The official Saab service center that did the pressure test looked it up to confirm all recalls were fixed, but I didn't think to ask when the tank was replaces.Ģ. I don't know when or how many miles ago the tank was replaced. Possibly the excessive heat under the hood soaks the tank immediately after driving and in some way causes the sensor to malfunction (warping, bad electrical connection, etc?) Any other conclusions?ġ. My only logical conclusion is the the tank needs to be replaced (again). The next morning when it is stone cold, no loss of coolant (measured with a mm ruler used as a dipstick). The light will come back on within a few minutes of starting. or so) cool down at idle for one minute stop with engine off for 10-45 mins drive again. I have closely tracked the behavior for several days, and it is repeatable: Drive until completely warmed up (up to 25 min. Tech has done a pressure test: no leaks discovered. I replaced the cap after the problems started. Here's the situation: No overheating, according to records, tank has been replaced. Owned 3 months, I started to have Low Coolant light issues about a month ago. I have a 2009 Aero convertible with only 39K miles. ![]() I've read quite a bit on this forum and elsewhere about the coolant tank issues with the V6.
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