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Cadillac STS Heater Core Replacement Cost

The average cost for a Cadillac STS Heater Core Replacement is between $694 and $890. Labor costs are estimated between $589 and $744 while parts are priced between $105 and $146. Estimate does not include taxes and fees.
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How Much Does a Heater Core Replacement Cost?

Heater Core Replacement Service and Cost

Best Practices

We recommend using a high-quality replacement heater core. Cheap heater cores tend to leak and not last very long.

The heater hoses should be inspected when replacing a heater core. Problems with the heater hoses can cause similar problems to a failing heater core and are less expensive to correct.

Common Symptoms

A failed Cadillac STS heater core can result in the car windows fogging up, coolant leaking under the dashboard, a sweet smell inside the vehicle, and mystery coolant loss.

Worn engine mounts allow the engine to move more than normal, which can damage heater core connections. Worn mounts should be replaced to avoid damage to the new heater hoses.

Most Common Cadillac STS Repairs

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