The cooling system of a GMC Van is one of the most important elements in the vehicle's operation. Yet is given far less attention than other automotive systems receive. Many factors can increase the strain of cooling to your GMC vehicle. The air conditioning is just one example. The air conditioning system most often places the condenser in front of the radiator, which restricts the airflow and cooling capability of the radiator. We recommend that you check your coolant level (also known as "antifreeze") when temperatures reach either cold or warm extremes. This is the simplest and most obvious way to maintain cooling system components. Complete replacement of your coolant should be done every 2 years or 24,000 miles whichever comes first. However, each vehicle is unique and you should always refer to your GMC Mini van owner's manual for specifics. Unchecked coolant levels can actually contribute to corrosion rather than preventing it if left unchecked causing overheating and possible engine damage in the long run. 
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