How much work is it to replace a heater core in a 2006 Chevy Cobalt?

Replacing the heater core in a 2006 Chevy Cobalt is a labor-intensive job that typically requires 6 to 8 hours of work. The process involves draining the coolant, removing the dashboard, and disconnecting various components to access the heater core. Given its complexity, it's often recommended to have a professional mechanic perform the replacement unless you have significant automotive repair experience. Additionally, the cost of parts and labor can vary, so it's advisable to check with a local mechanic for an accurate estimate.