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.

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  • 30 Answers

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

Posted on Feb 06, 2013

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6 Suggested Answers

Anonymous

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Posted on Jan 02, 2017

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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

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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1 Answer

HEATER NOT WORKING ON 03 YUKON


Heater not working ???? Blower motor not working , no air blowing out of the vent's. defrost , floor ? I'm assuming you have the manual HVAC - climate control system , by the fact that you replaced the resistor assembly . Was there a relay included on the resistor assembly ? What fuse's did you replace ? HTR/AC - 30 amp. left I/P fuse box , BLOWER fuse -40 amp - under hood fuse box ? Did you use a DMM - digital multi-meter an test for B+ voltage at the purple wire at the blower motor ? The fuse's you replaced ,check for B+ voltage with meter .
Your vehicle could have two different HVAC systems , manual & automatic. The automatic system doesn't have a resistor assembly , has a blower motor control processor. Do you know how to test automotive electrical circuit's ?

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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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Yes my fuse for my wipers keeps blowing and my wipers turn on when i plug fuse in even know the wipers are turned off.


The power distribution box in the engine compartment # 6 , 30 amp mini - fuse , front wiper motor , front wiper relay , front washer pump , FEM ( also # 7 , 25 amp mini - fuse , rear wiper etc. ) The owners manual shows to disconnect your battery cables before servicing anything in the PD BOX

your relay could be shorted which makes the fuse keep blowing

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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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1 Answer

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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1 Answer

Got a 207 chevy tahoe ltz--rear air works ---front air does not work. any suggestions?


"2007 chevy tahoe ltz--rear air works ---front air does not work." Hi! I guess you are referring to the front hvac blower not blowing air at any speed and not coming out at any vents at any mode position. If this is the case, you can start with the fuses at the underhood fuseblock. Check out the three hvac labeled fuses. If found okay, and the hvac controller on your dashboard seemed to be working normally, you better check out your front hvac blower motor underneath the right IP section. You need to verify if power is reaching your front hvac blower when requested by the a/c blower controller. I hope you get lucky. If this is not for you, perhaps a few more detailed symptoms would be helpful. : )

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3 Answers

2002 GMC Yukon front A/C blowing warm air


Here is a TSB (Technical Service Bulletin) for your vehicle for loss of temp control.
File In Section: 01 - HVAC
Bulletin No.: 01-01-39-007
TECHNICAL
Subject:
Loss Of HVAC System Mode and/or Temperature Control 

(Reroute Wiring Harness)
Models
1999-2002 Chevrolet and GMC C/K Pickup Models (Silverado and Sierra) 1999-2002 Chevrolet and GMC C/K Utility Models (Avalanche, Suburban, Tahoe, Yukon, Yukon XL, Denali) 2001 GMC Sierra C3
2002 GMC Sierra Denali
2002 Cadillac Escalade, Escalade EXT
Some customers may comment that they cannot control the HVAC system modes and/or the temperature. These concerns may be intermittent.
Cause
There may be poor terminal contact and/or bent terminals in connectors C206 (RPO C68 automatic HVAC controls) or C296 (RPO C60 manual HVAC controls). Excessive tension on the wires due to the wiring harness being miss routed in the instrument panel carrier may cause these conditions.

If the warranty campaign is over i am sure they can or may have in the system on how to correct the problem.
Good luck and hope this helps, keep me posted if you need help on to the repair procedure.


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1 Answer

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Temp. actuator maybe. A electrica motor that moves a door from cold to hot in the rear HVAC unit . Removing the rear trim panel to get at the auxiliary HVAC unit would need to be done . Search on youtube , video showing how to do it .
Rear auxiliary heat and actuator overview repair for Yukon Tahoe Suburban...
2004 Tahoe rear hvac system only blows cold air diagnosis and temporary fix

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