How to replace the Heater Core on 2010 Cadillac STS?

In order to change the heater core, take off the HVAC module and bracket screw of heater hose. Pull the old core of heater out and install the new core into the HVAC module. Install the HVAC module once again, reattach the heater hose bracket and screw, and reattach the heater hose.

OEM 2010 Cadillac STS Heater Core

HVAC Heater Core

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2010 Cadillac STS Heater Core Part Number: 89022548
$73.91 MSRP: $133.78
You Save: $59.87 (45%)
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Product Specifications
- Other Name: Core, Heater Core
- Item Weight: 3.10 Pounds
- Item Dimensions: 9.5 x 21.6 x 14.7 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 89022548
- Warranty: This genuine part is guaranteed by GM's factory warranty.
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Fits the following 2010 Cadillac STS Submodels:
- Base, Platinum, V | 6 Cyl 3.6 L GAS, 8 Cyl 4.4 L GAS, 8 Cyl 4.6 L GAS

2010 Cadillac STS Heater Core

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2010 Cadillac STS Heater Core Parts and Q&A

Q: How to replace the Heater Core on 2010 Cadillac STS?
A: In order to change the heater core, take off the HVAC module and bracket screw of heater hose. Pull the old core of heater out and install the new core into the HVAC module. Install the HVAC module once again, reattach the heater hose bracket and screw, and reattach the heater hose.