How to replace the auxiliary HVAC Control Module on an extended wheelbase on 2009 Chevrolet Tahoe?

In order to change the auxiliary HVAC module of an extended wheelbase car, remove refrigerant and empty the engine coolant. Take out heater and air conditioning lines out of the module and take out nuts that are securing them and take off electrical connectors. Install the module again, reconnect, fill up with coolant, recharge refrigerant and do a leak check.

OEM 2009 Chevrolet Tahoe HVAC Control Module

Heater Control Assembly

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2009 Chevrolet Tahoe Blower Motor Resistor Part Number: 84178783
$89.14 MSRP: $183.19
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Product Specifications
- Other Name: Module Assembly-Blower Motor Control; Control Module; Resistor
- Replaces: 13503201, 13598134, 13598091, 15141283, 13598090, 13501703, 22811003
- Item Weight: 0.70 Pounds
- Item Dimensions: 7.2 x 7.1 x 6.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 84178783
- Warranty: This genuine part is guaranteed by GM's factory warranty.
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Fits the following 2009 Chevrolet Tahoe Submodels:
- Commercial, High Country, Hybrid, LS, LT, LTZ, PPV, Premier, RST, SSV, Z71 | 6 Cyl 3.0 L DIESEL, 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

2009 Chevrolet Tahoe HVAC Control Module

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2009 Chevrolet Tahoe HVAC Control Module Parts and Q&A

Q: How to replace the auxiliary HVAC Control Module on an extended wheelbase on 2009 Chevrolet Tahoe?
A: In order to change the auxiliary HVAC module of an extended wheelbase car, remove refrigerant and empty the engine coolant. Take out heater and air conditioning lines out of the module and take out nuts that are securing them and take off electrical connectors. Install the module again, reconnect, fill up with coolant, recharge refrigerant and do a leak check.