Question about 2000 Chevrolet Tahoe

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I have a 2000 tahoe and the heater and A/C wont work. All the fuses seem to be OK. Its 30 degrees out and I have three kids and not much money. Any suggestions as to what my next step might be? Thanks, Grant

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There is an inline fuse for the blower behind the heater control.This fus is probably blown.

Posted on Dec 03, 2008

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Where is the brake relay on a 2000 tahoe


No relay in the wiring diagram. There is a 20amp hazard fuse and a 10amp vehicle stop fuse in the engine compartment fuse box.
If those fuses are good, and the brake light switch checks out ok, I would look at the turn signal switch next.

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Jan 02, 2011 | 2000 Dodge Caravan

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I had my battery changed in my 2004 Chevrolet Tahoe and since then my heater has been blowing cold air and it's 30 degrees out. HELP!!!


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1 Answer

Heater wont warm up in a 2000 chev tahoe


Check that the heater core's two tubes that enter the firewall are getting hot. If they are, then you are having a blend door problem which will require disassembling the dashboard instruments to get at the vacuum motors that control the blend doors.

If the heater core is not getting hot at both tubes, then the following procedure outlines how to change the heater core out:

Removal & Installation






Heater core removal
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To Remove:



  1. Remove the HVAC assembly.
  2. Remove the heater core cover screws.
  3. Remove the heater core cover from the HVAC assembly.
  4. Remove the heater core gasket from the core.
  5. Remove the heater core from the HVAC module assembly.


To Install:



  1. Install the heater core to the HVAC module assembly.
  2. Install the heater core cowl gasket to the HVAC module assembly.
  3. Install the heater core cover and screws to the HVAC module assembly.
  4. Install the HVAC module assembly to the vehicle.


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Oct 29, 2010 | 2000 Chevrolet Tahoe

1 Answer

2000 F250 super duty v10 engine. no heat. coolant changed. fuses, thermostat are ok. temp gauge operates normally. both heater core hoses are warm but still no heat in cab.


check the vaccum hoses on the passenger side under hood. I think that there are two hoses but it might be three. they get brittle and leak. but they move a little valve that you can move yourself just to see if heat works then. it is inline with the heater hoses I think. Bear with me though because it has been about 3-4 years ago when I figured this one out. it is definately a vaccum problem. there is also a set of vaccum hoses under passenger side of dash, several colors in it. might want to look there because sometimes kicked by peoples feet but money is on the ones inline with heater core. just move linkage and see if it gets hot air. Hope I helped and didnt confuse.

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Car only blows cold air


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