How to replace the auxiliary heater core on GMC Yukon XL 2500?

The process of changing the auxiliary heater core begins with the removal of the auxiliary HVAC module followed by unattachment of the air temperature actuator connecting to the module. First access the stud beneath the auxiliary HVAC module while between the heater core inlet and outlet pipes before gently removing the heater core pipe gasket from the module case to take out the heater core pipe retainer. Begin heater core replacement by first removing the auxiliary HVAC module lower cover after you detach the heater core clamp before pulling out the heater core from the auxiliary HVAC module. When installing the core place it inside the auxiliary HVAC module then fasten it with heater core clamp. Insert the auxiliary HVAC module lower cover before installing the heater core pipe retainer along with its gasket. The installation of the stud between heater core inlet and outlet should take place under the rear HVAC module while reattaching the air temperature actuator to the auxiliary HVAC module followed by installation of the auxiliary HVAC module assembly back in the vehicle.

OEM GMC Yukon XL 2500 Heater Core

HVAC Heater Core

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GMC Yukon XL 2500 Heater Core
Part Number: 89018297
$155.32 MSRP: $319.18
You Save: $163.86 (52%)
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Product Specifications
- Other Name: Core, Heater Core; HVAC Heater Core
- Replaces: 52473326, 52473322
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000-2013 GMC Yukon XL 2500 | SLE, SLT | 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS
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GMC Yukon XL 2500 Heater Core
Part Number: 52478848
$62.91 MSRP: $113.86
You Save: $50.95 (45%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Core Assembly, Auxiliary Heater; Core, Heater Core
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000-2006 GMC Yukon XL 2500 | SLE, SLT | 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS
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GMC Yukon XL 2500 Heater Core
Part Number: 19258989
$135.28 MSRP: $278.00
You Save: $142.72 (52%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Core, Heater Core
- Replaces: 88986627
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2006 GMC Yukon XL 2500 | SLE, SLT | 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS
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GMC Yukon XL 2500 Heater Core
Part Number: 25882728
$72.12 MSRP: $148.22
You Save: $76.10 (52%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Core Assembly-Auxiliary Heater; Core, Heater Core
- Replaces: 15225891
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2013 GMC Yukon XL 2500 | SLE, SLT | 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS

GMC Yukon XL 2500 Heater Core

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GMC Yukon XL 2500 Heater Core Parts Questions & Experts Answers

Heater Core
89018297
Q: How to replace the auxiliary heater core on GMC Yukon XL 2500?
A: The process of changing the auxiliary heater core begins with the removal of the auxiliary HVAC module followed by unattachment of the air temperature actuator connecting to the module. First access the stud beneath the auxiliary HVAC module while between the heater core inlet and outlet pipes before gently removing the heater core pipe gasket from the module case to take out the heater core pipe retainer. Begin heater core replacement by first removing the auxiliary HVAC module lower cover after you detach the heater core clamp before pulling out the heater core from the auxiliary HVAC module. When installing the core place it inside the auxiliary HVAC module then fasten it with heater core clamp. Insert the auxiliary HVAC module lower cover before installing the heater core pipe retainer along with its gasket. The installation of the stud between heater core inlet and outlet should take place under the rear HVAC module while reattaching the air temperature actuator to the auxiliary HVAC module followed by installation of the auxiliary HVAC module assembly back in the vehicle.

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