GMC automobile enthusiasts have come to expect a certain level of reliability when driving their Envoy around town. Car aficionados know that a brand you can trust is built into each GMC, and understand that only the best replacement Envoy parts will suffice when your car or truck needs fixing. Your GMC dealership isn't the only place to buy genuine or original equipment quality parts to repair your Envoy. Anyone who drives a GMC knows that when it comes to repairing their car, truck, or SUV only the most superior replacement parts will do.
The technology to heat the passenger compartment of an automobile came long before one was invented. The engine of your GMC Envoy constantly pumps and turns a mixture of water and ethylene glycol through the engine block in order to absorb the heat it generates, and sends this liquid to the heater core (a small radiator) through a heater supply hose when you want to warm your vehicle's cabin. If you've ever wondered why there are two hoses leading to the passenger side of your firewall, that's where the heater core is located. Essentially, your GMC Envoy heater core acts like a radiator; in that it uses the engine coolant to emit heat for the blower motor to propel into the inside of the car.
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