Question about 2005 GMC Yukon

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I need instructions on replacing a heater core for my 2005 GMC Yukon.

Passenger floor is soaked, heater and defrost does still work, Coolant is low. I don't know how to get to the heater core for a 2005 Yukon.

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Posted on Jan 02, 2017

  • 3 Answers

SOURCE: need a diagram or instructions on how to replace a heater core 97

buy a haynes repair manual for your vehicle

Posted on Mar 12, 2009

michigan man
  • 3533 Answers

SOURCE: Heater Core Replacement

try autozone.com to see if they have your car listed for diagrams pictures and step by step instructions if your car is not listed then try your local library they have all the car manuals and even copy them for you and here is a place that sells only GM parts Schram auto and truck parts 1-800-292-1032 if you need it

Posted on Mar 13, 2009

  • 460 Answers

SOURCE: I replaced heater core in 1999 gmc sierra 1500 5.3

no,, the system works from a vacuum and has to be worked on in a service garage. sorry about the bad news...

Posted on Nov 12, 2009

  • 1244 Answers

SOURCE: coolant too hot message displayed 2005 gmc yukon denali

either thermostat stuck!! or head gasket is blown

Posted on Jan 14, 2010

  • 145 Answers

SOURCE: Since I purchased my 2000 GMC Yukon XL 1500 we

You may be right about the sun roof. It should have 4 tubes to drain water that comes in around the glass. Sometimes the tubes fall off letting the water come into the cabin. The horn may be the part in the wheel. Apply it at different angles and it might start working. Sometimes they get rusty. I think your cabin filter would be under the hood near the firewall on the passenger side with a plastic cover.

Posted on Jan 15, 2010

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2 Answers

Water leak on Passenger Side Floor of 2001 GMC Denali


Better check the heater core it sounds like it is leaking. A little antifreeze will spread a long ways.

Jul 11, 2014 | 2003 GMC Yukon XL

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Why is the floorboard on passenger side wet? It's a 2003 gmc Yukon . We've had the AC tube blown and drained. Wat else could it be?


It is a good chance it is anti freeze from a leaking heater core. See if it smells like coolant. If so you can pull the coolant lines off the heater core in the engine bay and put them together to bypass it until it is fixed

Oct 04, 2012 | 2003 GMC Yukon

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Water standing on passagers side, drove about 50 miles low coolant light came on running fine and heater seems to be working


The problem is that the heater core has started to leak. The 'water' on the passenger side floor is actually coolant that is leaking from the heater core (hence the low coolant light).

Nov 29, 2010 | 1995 Oldsmobile Aurora

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How to replace the heater core in a 1998 gmc Yukon.


Heater Core Removal & Installation To Remove:
  1. Disconnect the negative battery cable.
  2. Drain the coolant from the engine.
  3. Recover the refrigerant.
  4. Remove the glove compartment.
  5. Remove the floor air outlet.
  6. If equipped with a diesel engine, remove the powertrain control module.
  7. Remove the kick panel trim.
  8. Remove the blower motor.
  9. Remove the steering column.
  10. Tilt back the instrument panel assembly.
  11. Remove the coolant recovery reservoir from the engine compartment.
  12. Disconnect the heater hoses and the evaporator tube.
  13. Remove the accumulator.
  14. Remove the fasteners and the HVAC module assembly.
  15. Remove the cover plate on the bottom of the HVAC module.
  16. Remove the heater core and seal from the HVAC module.
HVAC module mounting fastener locations gm-10-00-1003.gif

HVAC module components gm-10-00-1004.gif

To Install:
  1. Install the heater core and seal.
  2. Install the cover plate on the bottom of the evaporator case to the HVAC module.
  3. Install the HVAC module in the vehicle.
  4. Install the accumulator.
  5. Connect the evaporator tube and heater hoses.
  6. Install the coolant recovery reservoir.
  7. Install the instrument panel.
  8. Install the steering column.
  9. Install the blower motor and cover.
  10. Install the kick panel trim.
  11. Install the powertrain control module and tray.
  12. Install the floor air outlet.
  13. Add coolant to the cooling system.
  14. Connect the negative battery cable.
  15. Evacuate and charge the A/C system.
  16. Check the system for leaks.
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Nov 06, 2010 | 1998 GMC Yukon

1 Answer

Coolant leaks into passenger side floor and haze comes out of vents


usually when this happens it is the heater core that is leaking. does the windshield get fogged with defroster on!! if so its the heater core. good-luck and have a good day.

Sep 21, 2010 | 2005 Pontiac Grand Prix

1 Answer

04 gmc yukon heater air cold passanger side.


If this happens when you are idle, and then you get hot air as you drive, most likely you have low coolant and it only cycles as you drive. Get approved dextrom gmc coolat and cap off your coolant it is most likely low.

Jan 17, 2010 | 2003 GMC Yukon XL

2 Answers

2005 GMC Sierra 1500 - heater blows, but only cold air


Check coolant level. Check for heat at the heater hose going from water pump to heater core at firewall. Check to see that cable is moving coolant control valve from the closed to open position. Low mileage so it shouldn't be plugged heater core.

Jan 07, 2010 | 2005 GMC Sierra

2 Answers

Water leak passenger side in dodge caravan 2005 carpet soaked


look at the firewall on the engine side and you will see a small stub hose coming out on passenger side about even with the bottom of the heater box inside. that hose drains condensation from the ac...clear it out and you will have a dry floor. (unless heater core is leaking but you didn't mention any overheat or coolant loss so likely that's not a problem)

Jun 15, 2009 | 2003 Dodge Caravan

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