2001 GMC Sierra Heater core

2001 GMC SIERRA
197,000 MILES • V8 • 4WD • AUTOMATIC
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JRMIKE34
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Coolant leaking from tube under ac system in engine area. Heater core bad? What the easiest way to replace heater core?
Nov 7, 2010 at 10:07 AM
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KHLOW2008
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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.


https://images.2carpros.com/forum/automotive_pictures/192750_Heater01SierraFig207_2.jpg

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


https://images.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.


https://images.2carpros.com/forum/automotive_pictures/192750_Heater01SierraFig203_1.jpg

3. Remove the heater core cover.


https://images.2carpros.com/forum/automotive_pictures/192750_Heater01SierraFig204_1.jpg

4. Remove the heater core. Installation Procedure Reverse procedure
Nov 7, 2010 at 12:53 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.