HEATER CORE

2001 GMC Sierra

Tiny

Jrmike34

November, 7, 2010 AT 10:07 AM

Heater problem
2001 GMC Sierra V8 Four Wheel Drive Automatic 197000 miles

Coolant leaking from tube under ac system in engine area. Heater core bad? What the easiest way to replace heater core?

FOUND 377 RELATED QUESTIONS

1 Answer

Tiny

KHLow2008

November, 7, 2010 AT 12:53 PM

HEATER/VENT MODULE REPLACEMENT
Removal Procedure

1. Drain the engine coolant.
2. If equipped remove the auxiliary battery.
3. Disconnect the heater hoses.

4. Remove the accumulator.

5. Remove the instrument panel carrier.

6. Remove the HVAC module drain hose.


http://www.2carpros.com/forum/automotive_pictures/192750_Heater01SierraFig207_2.jpg



7. Disconnect the electrical harnesses and the ground connections as needed.


http://www.2carpros.com/forum/automotive_pictures/192750_Heater01SierraFig208_1.jpg



8. Remove the HVAC module mounting nuts and the screws.

9. Remove the HVAC module assembly from the vehicle.

Installation Procedure

Reverse procedure

HEATER CORE REPLACEMENT
Removal Procedure

1. Remove the heater/vent module.
2. Remove the heater core cover screws.


http://www.2carpros.com/forum/automotive_pictures/192750_Heater01SierraFig203_1.jpg



3. Remove the heater core cover.


http://www.2carpros.com/forum/automotive_pictures/192750_Heater01SierraFig204_1.jpg



4. Remove the heater core.

Installation Procedure

Reverse procedure

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