If you are standing in front of the truck with the hood up, it is in the back left corner to the right of the heater resistor.
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∙ 2014-02-02 16:38:46were is the heater relay on1996 jimmy?
GOOGLE!
There is a fuse and a relay.
They did'NT make the Trailblazer in 2000 might you be looking for information for a 2000 Blazer.
Heater Airbound? Heater control cable not working? Heater core plugged?
Yes.
No it will not, it will just back flush the heater core and clean it out.
this model does not have a heater control valve, it has a specail thermostat that controls flow.
under the hood on drivers side in a big black relay box
You can but you still won't be able to get it out.
The heater blend door is not run by vacuum. It is run by an electric actuator.
from my experience it is under the brake fluid reservoir