How Coolant Is SoldĬoolant is sold as “pre-mixed” or as concentrate. Note: It’s very important that you never mix red and green coolant! If your coolant reservoir has red coolant, do not add green coolant and vice versa. We say this to let you know that when you’re looking for a coolant leak, it could potentially be green or red. Just about everyone now uses red coolant with semi trucks. For our trucks, we only use the red coolant. In your car, you probably use green antifreeze. They’re good for different temperature ranges. They’re green and red, and they both smell about the same. There are at least 2 different kinds of coolant. When you turn on your heater and hot air blows out, you can thank your coolant system. The after-treatment “treats” the exhaust that’s leaving your engine.)Ĭoolant is also used to heat the interior of your cab. (That’s not technically part of your engine – it’s your exhaust, so to speak. It also keeps other components of your truck cool, mainly the after-treatment system. Your truck’s coolant system is a closed system that exists to keep the engine cool and running at optimum temperatures. What Is the Function of a Truck’s Coolant System? On-the-road service is overpriced and time-consuming, and while learning to fix it yourself can take a little practice, we’re here to help. When you’re on the side of the road, the last thing you want to be dealing with is a coolant leak. Some areas are easier to get to while others can pose a challenge. If it leaks anywhere, it’s all the same coolant system, so anywhere that has a leak in that system is going to cause you problems. There’s basically coolant from the nose to the end of the sleeper. Always protect yourself with safety glasses and gloves when working with the coolant on your Sierra 2500 HD.Coolant systems are notorious for causing leaks, because the coolant fluid travels to a lot of different places – the after-treatment system, the heating system, and the engine.Ĭoolant actually runs all the way to the back of your cab. An anti-freeze leak can cause the temp sensor to record high engine temperatures in a 2016 GMC Sierra 2500 HD. If you ignore a small coolant leak long enough, you will run out of coolant, which leads to an overheated engine and other serious, but highly avoidable, problems. This video shows you where the coolant reservoir, hoses and connections on your 2016 Sierra 2500 HD Denali are located and the steps needed to fix minor leaks.Ī few things to note about coolant is that it is sweet tasting and highly toxic, so it can end up in the dog's stomach pretty quickly. Otherwise, your Sierra 2500 HD may have a radiator leak. However, a coolant leak (aka an antifreeze leak) is most likely to occur where the hoses connect to the engine or radiator. Coolant / antifreeze can leak from the reservoir, radiator or any hose, in 2016 Sierra 2500 HD with the 6.6 liter engine. Engine coolant (which is also called antifreeze or anti-freeze) moves through the inside of your Sierra 2500 HD engine and keeps it from overheating. Leaking coolant / antifreeze is one of the more common types of leaking fluid from Sierra 2500 HD engines. Follow the steps in this video to see how to fix minor coolant (antifreeze) leaks in your 2016 GMC Sierra 2500 HD.
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