Question about 2001 GMC Yukon XL

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Front HVAC fuse keeps blowing

2001 Yukon rear Hvac works fine, front is dead, 30amp fuse in engine compartment is blown, replaced w/ another 30 amp fuse and as soon as I switch it on, that one burns out too. Not sure what to check next.

Posted by Jon Fogle on

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roger conley

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  • Contributor
  • 30 Answers

Could be a bad ignition switch.. needs to be checked by a professional.

Posted on Feb 06, 2013

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5 Related Answers

russ70z

  • 21 Answers

SOURCE: I have a 2001 yukon with a front and rear air

neighbor had this problem with his yukon,found bad lines to the rear air.extremely expensive.good luck

Posted on Sep 06, 2009

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Ronnie Houston

  • 2920 Answers

SOURCE: 2002 GMC Yukon blows cold air from the front, rear works fine

check you antifreeze level and make sure its full

Posted on Jan 26, 2009

John Bloomfield

  • 534 Answers

SOURCE: MY HVAC fan stopped blowing. Checked all the

Check the blower motor speed control resistor pack is ok.
(The resistor pack is usually located in the blower fan ducting in the air flow).
Check condition of electrical connection terminals on the blower motor circuit - these terminals pass considerable current and over time may fatigue overheat and loosen.
Check operation/replace any blower motor control relay,
Check the blower motor will run if +12v directly applied to the blower motor.
Check operation of the blower motor speed control switch is ok.

Posted on Oct 08, 2009

ministock48

Bobby Memory

  • 258 Answers

SOURCE: My 2005 Yukon XL is not blowing heat out of the

check and make sure the duct work going to the rear vents are attached and in good condition

Posted on Oct 19, 2009

jsmes1027

Jonathan S

  • 749 Answers

SOURCE: 2005 GMC Yukon Denali XL - Climate Control issue-

Are you aware of any codes that may stored in the body control module and do you hear a clicking or ticking noise in the rear?

Posted on Nov 02, 2010

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I would bet that the 30 amp fuse feeds the motor and the 10 amp fuse feeds both of the switches. Can you remove the rear trim to gain access to the rear motor and unplug it?

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There's a rear hvac fuse 30amp that powers an auxillary blower motor processor controller. The controller has the resistor to regulate fan speed. The front and rear fan control both pass thru the front controller first then to the rear processor.
You may need a shop manual to be able to diagnose the problem.

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There is a rear control module and a rear data processor for the blower motor and the blend doors.
Your probably going to need a shop manual to have the test procedures for those circuits.
One orange wire goes to the module from a 10amp fuse in the box in the engine compartment, the other orange wire goes to the module from a 30amp fuse in the same box. There is a third orange wire between the front HVAC control panel and the rear module.

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YOUR REAR AC AND HEATER CONTROLS SHOULD HAVE RR HVAC FUSES IN THE FUSES RELAYS BOX UNDER THE HOOD IN THE ENGINE COMPARTMENT.

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My 2005 gmc yukon rear a/c or heat blower will not come on front a/c and heat work well


{: ) If the front a/c and heater is working fine, that's good. At least the problem can be isolated on the rear HVAC circuits only.
Check first the RR HVAC fuse 30amp at the underhood fuseblock and the IGN 3 fuse 10amp at the IP fuseblock. If you found them good, then you can begin diagnosing the blower circuits wirings and connectors.
A faulty blower definitely will not give any output. If it doesn't spin for some reason, rear a/c or heating cannot be circulated.
A faulty blower resistor or speed control processor can also cause a zero air output. Sometimes, the blower may only work at certain speeds only.
A faulty rear HVAC control switch may not give the proper signals to the blower resistor or speed controller, and in turn will render the blower motor disabled.
Sometimes it can be a terminal connector being loose or burnt. However, the most usual cause for this type of problem is a faulty blower resistor.

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I HAVE A 1997 GMC YUKON, 5.7 ENGINE. RECENTLY WHILE DRIVEN THE ENGINE JUST SHUT DOWN. THE ECM-1 FUSE WAS BLOWN. AFTER REPLACING THE VEHICLE STARTED BACK UP, WENT MAYBE A 100 YARDS AND IT BLEW AGAIN. I PUT...


Sounds like the computer has short in it. You can get a computer at Oreillys auto parts for around $140.00. You will need to call the part store and order the ecm and give them some info on your engine, so the replacement ecm can be programmed for your vehicle.

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