It’s a long-life coolant that was originally developed for use in GM’s aluminum engines, but it can be used in any engine.Īlthough Dex-Cool has been used successfully by millions of GM customers over the years, there have been some reports of problems with it. Dex-Cool is an OEM (original equipment manufacturer) coolant designed by General Motors. If you own a GM car or truck built after 1995, it probably uses Dex-Cool coolant. If your car starts to overheat or experience other cooling system issues, it is best to take it to a mechanic for diagnosis and repair. If you have a GM vehicle that was manufactured between 19, it is important to be aware of the potential problems that can occur with Dex-Cool. As a result, GM stopped using Dex-Cool in their vehicles in 2006. In some cases, it has even caused engines to fail completely. However, Dex-Cool has been linked to engine overheating and corrosion issues. Dex-Cool was touted as being more environmentally friendly and providing better cooling properties than traditional coolants. It was introduced in the mid-1990s as a replacement for conventional ethylene glycol based coolants. So, when did GM stop using Dex Cool?ĭex-Cool was an antifreeze used by General Motors (GM) in their vehicles. The coolant in your car is important to its overall health and performance. The answer is that GM is still using Dex-Cool, but they have changed the formulation to try to address the problems that have been reported. As a result, some people are wondering when GM stopped using Dex-Cool. In recent years, there have been reports of engine damage caused by Dex-Cool. The coolant used in GM vehicles has been Dex-Cool since 1996.
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