How to replace the heater core in the auxiliary HVAC module on Chevrolet Tahoe?

Start the replacement process of the heater core in the auxiliary HVAC module by first recovering refrigerant from A/C systems and draining engine coolant. Disconnect the heater lines (2, 3) and air conditioning lines (2, 3) which originate from the auxiliary HVAC module present underneath the vehicle. First remove safety stands from the studs that hold the auxiliary HVAC module before lowering the vehicle. To proceed with installation begin by taking off the right rear quarter trim panel and unplug electrical connectors from the Real Time Damping (RTD) Module when required. Pull the upper auxiliary air duct fastener then raise the duct into the headliner area. Move the fasteners from the rear auxiliary HVAC module retention sites before you extract it to a work station. The first step is to detach the air temperature actuator then the heater core cover and finally the heater core from the module. The module gets the new heater core while the installation requires heater core cover and air temperature actuator placement afterward. After insertion of the auxiliary HVAC module assembly back into the vehicle space through two installed bolts. Connect the upper auxiliary air duct to the air distributor duct by using fastener and reestablish the electrical connections. The installation requires adding the RTD Module followed by reinstalling the right rear quarter trim panel. After another vehicle lift the auxiliary HVAC module demands two nuts secured at 9 N.m which is equivalent to 80 lb in. Fasten air conditioning lines (2, 3) and nut to the auxiliary HVAC module before tightening the nut to 16 N.m (12 lb ft) while also connecting heater lines (2, 3). Perform the following steps: Remove the safety stands, slowly lower the vehicle after which you need to add new engine coolant then charge the air conditioning system with refrigerant.

OEM Chevrolet Tahoe Heater Core

HVAC Heater Core

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9 Heater Cores found

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Chevrolet Tahoe Heater Core
Part Number: 19258989
$135.28 MSRP: $278.00
You Save: $142.72 (52%)
Ships in 1-2 Business Days
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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 Chevrolet Tahoe | Base, LS, LT, Z71 | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS
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Chevrolet Tahoe Heater Core
Part Number: 89019173
$100.02 MSRP: $205.54
You Save: $105.52 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Core, Heater; HVAC Heater Core; Core, Heater Core
- Replaces: 52467018
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1995-2000 Chevrolet Tahoe | Base, Limited, LS, LT, Z71 | 8 Cyl 5.7 L GAS, 8 Cyl 6.5 L DIESEL
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Chevrolet Tahoe Heater Core
Part Number: 89018297
$155.32 MSRP: $319.18
You Save: $163.86 (52%)
Ships in 1-2 Business Days
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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:
- 2000-2014 Chevrolet Tahoe | Base, Hybrid, LS, LT, LTZ, Z71 | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L FULL HYBRID EV-FLEX (FHEV), 8 Cyl 6.0 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
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Chevrolet Tahoe Heater Core
Part Number: 84406079
$83.15 MSRP: $170.88
You Save: $87.73 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Core Kit-Heater; HVAC Heater Core; Core, Heater Core
- Replaces: 15232212
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2020 Chevrolet Tahoe | Hybrid, LS, LT, LTZ, PPV, Premier, SSV | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L FULL HYBRID EV-FLEX (FHEV), 8 Cyl 6.0 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
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Chevrolet Tahoe Heater Core
Part Number: 85108010
$58.49 MSRP: $120.20
You Save: $61.71 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Heater Assembly-.; Heater, Auxiliary Heater
- Replaced by: 87846949
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2023 Chevrolet Tahoe | Commercial, High Country, LS, LT, PPV, Premier, RST, SSV, Z71 | 6 Cyl 3.0 L DIESEL, 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L GAS
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Chevrolet Tahoe Heater Core
Part Number: 84689022
$49.10 MSRP: $87.68
You Save: $38.58 (44%)
Ships in 1-3 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:
- 2021-2023 Chevrolet Tahoe | Commercial, High Country, LS, LT, PPV, Premier, RST, SSV, Z71 | 6 Cyl 3.0 L DIESEL, 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L GAS
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Chevrolet Tahoe Blower Motor
Part Number: 84418887
$94.53 MSRP: $279.78
You Save: $185.25 (67%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Heater Assembly-.; Heater Core; Heater, Auxiliary Heater; Heater, Heater Core
- Replaces: 22808761, 23281453
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2015-2020 Chevrolet Tahoe | LS, LT, LTZ, PPV, Premier, SSV | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
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Chevrolet Tahoe Heater Core
Part Number: 89024919
Product Specifications
- Other Name: Core Assembly, Auxiliary Heater; Core, Heater Core
- Replaces: 12477714
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000-2006 Chevrolet Tahoe | Base, LS, LT, Z71 | 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS
View related parts
Chevrolet Tahoe Heater Core
Part Number: 52467017
Product Specifications
- Other Name: Core, Heater; Core, Heater Core
- Replaces: 52461009
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1995-1999 Chevrolet Tahoe | Base, LS, LT | 8 Cyl 5.7 L GAS, 8 Cyl 6.5 L DIESEL

Chevrolet Tahoe Heater Core

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Chevrolet Tahoe Heater Core Parts Questions & Experts Answers

Heater Core
89019173
Q: How to replace the heater core in the auxiliary HVAC module on Chevrolet Tahoe?
A: Start the replacement process of the heater core in the auxiliary HVAC module by first recovering refrigerant from A/C systems and draining engine coolant. Disconnect the heater lines (2, 3) and air conditioning lines (2, 3) which originate from the auxiliary HVAC module present underneath the vehicle. First remove safety stands from the studs that hold the auxiliary HVAC module before lowering the vehicle. To proceed with installation begin by taking off the right rear quarter trim panel and unplug electrical connectors from the Real Time Damping (RTD) Module when required. Pull the upper auxiliary air duct fastener then raise the duct into the headliner area. Move the fasteners from the rear auxiliary HVAC module retention sites before you extract it to a work station. The first step is to detach the air temperature actuator then the heater core cover and finally the heater core from the module. The module gets the new heater core while the installation requires heater core cover and air temperature actuator placement afterward. After insertion of the auxiliary HVAC module assembly back into the vehicle space through two installed bolts. Connect the upper auxiliary air duct to the air distributor duct by using fastener and reestablish the electrical connections. The installation requires adding the RTD Module followed by reinstalling the right rear quarter trim panel. After another vehicle lift the auxiliary HVAC module demands two nuts secured at 9 N.m which is equivalent to 80 lb in. Fasten air conditioning lines (2, 3) and nut to the auxiliary HVAC module before tightening the nut to 16 N.m (12 lb ft) while also connecting heater lines (2, 3). Perform the following steps: Remove the safety stands, slowly lower the vehicle after which you need to add new engine coolant then charge the air conditioning system with refrigerant.