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Randall
Randall, ASE Certified Technician
Category: GMC
Satisfied Customers: 12744
Experience:  ASE Master Tech, 32 Years Diagnostic and repair,Electrical specialist
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How to remove heat vent modulator to replace heater core

Customer Question

How to remove heat vent modulator to replace heater core
Submitted: 11 months ago.
Category: GMC
Customer: replied 11 months ago.
Dash is removed and so is blower resistance
Expert:  Randall replied 11 months ago.

Hello, not quite sure what you mean by vent modulator, to start, I need the year of the truck

Customer: replied 11 months ago.
98 heat ventalater modulated it is the vents wrapped around heater core
Expert:  Randall replied 11 months ago.

ok, what you are at is you have to remove the whole HVAC unit fro the firewall now that dash is out,. You cant do the core with the case still bolted in, Too hard to explain each step, but some work is done through the inner wheel house and some bolts inside, Once you have unhooked bolts, coolant lines , ac etc, then you can pull the HVAC case and get to the heater core, I have attached 2 links, one for the core itself AFTER the case is out and the other is how to remove the HVAC case

Expert:  Randall replied 11 months ago.

link

Expert:  Randall replied 11 months ago.

still trying to send

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