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I need a step by step procedure on how to replace a heater core in a 2001 GMC Jimmy. I have everthing pulled apart but there must be something still holding it together and I already got the one under the hood on the firewall need pictures of how to do this.

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Your best bet is to pickup a Chilton's Repair Manual for your model Jimmy at any auto parts store (i.e. Advance Auto, NAPA, Auto Zone, etc.) It will have pictures and drawings, as well as written instructions. Good luck!

Posted on Apr 04, 2011

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Posted on Jan 02, 2017

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My 2001 jimmy has a slow and sluggish takeoff and acceleration speed. Wiring harness was melted apart from busted heater core hose.would a bad connection cause this problem.


Usually not. If it is shuddering while accelerating it's usually a plug wire. If you have a check engine light on then start there

Oct 29, 2016 | 2001 GMC Jimmy

1 Answer

The a/c dont working only heater


If the compressor is running and one of the ac lines is cold, you probably have a blend door stuck or faulty in the HVAC box under the dash. The blend doors direct air thru the heater core and evaporator core as well as thru the vents.

Jul 27, 2012 | 2000 GMC Jimmy

1 Answer

Replace heater core


For heater core replacing procedure.I suggest you to go through this related help links.Its all complete step by step procedure :----How to replace heater core for All car models?

Click the link below:---

http://technoanswers.blogspot.com/2011/11/how-to-replace-heater-core-for-all-car.html

--------------
How to Flush Heater Core?

http://schematicsdiagram.blogspot.com/2011/12/how-to-flush-heater-core.html

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How to Remove Heater Core ?

http://howtobyme.blogspot.com/2011/12/how-to-remove-heater-core-on-2008-honda.html
Heater Core Replacement?

http://howtobyme.blogspot.com/2011/12/honda-heater-core-replacement.html

------------
To replace heater core?http://technoanswers.blogspot.in/2012/02/how-to-replace-heater-core-on.html------How to replace heater core?http://technoanswers.blogspot.in/2012/02/how-to-replace-heater-core-on_10.html
----------This will help.Thanks.

Feb 05, 2012 | 2000 GMC Jimmy

1 Answer

Replace heater core


Hello,

To replace the core of your GMC 2001 Jimmy, You will be needing these instruments, Repair manual, Socket set, Screwdrivers, once You have them together, please follow the steps below:
  1. Lift up your car's hood and locate the heater core. If you are not sure where the core is located, an auto parts store employee or a repair manual can help.
  2. Remove the screws or bolts that hold the heater core in place. You may need to remove other parts of the car before being able to access the heater core.
  3. Disconnect the intake and outtake hoses from the heater core. You may need a special tool to remove the couplings that connect the hoses to the heater core (refer to your car model's repair manual.)
  4. Remove the heater core. Be careful not to tip the core over, as coolant will leak out.
  5. Reconnect the upstream and downstream hoses on the new heater core in the same matter that they were attached to the faulty core. Leaks can occur if the hoses are not connected properly.
  6. Screw or bolt new heater core in place.
  7. Finally, replace all of the removed car parts.
That is how to replace Your heater core.
Hope this was helpful. Thank You for using FixYa!!!

Jan 12, 2011 | 2001 GMC Jimmy

2 Answers

My heater will only blow out of the dash vents and won't move to floor or defrosters. Many have said to change the vacuum hoses. Can anybody tell me where to find them? Do I need to take apart the dash?


Heater flap works on vacum lines. My jimmy had same problem. Found out flap broke inside heater core. Gmc had a default. If something breaks it goes to defrost as safety precaution. Or a vacum leak in a hose to heater.

Nov 22, 2010 | 2001 GMC Jimmy

1 Answer

How do I flush the heater core without removing on 98 jimmy? I want to flush out the heater core but do not want to have to remove. Can someone give me step by step directions? Thanks


use the flush for the cooling system first. see if that helps. if not pull the hoses from the motor and use 40psi to blow through it should clear blockage

Dec 06, 2009 | 1998 GMC Jimmy

2 Answers

How do ypou remove heater core on a 1997 gmc


If yoou are working on a 1997 GMC Jimmy S or T-10 the assembly must come out to access heater box removal to replace heater core.

Aug 23, 2009 | 1997 GMC Jimmy

1 Answer

2001 GMC Jimmy Heater Core Replacement


back by the exhaust up around the case verry hard to get to good luck jimmy rate as fixya

Sep 15, 2008 | 2001 GMC Jimmy

2 Answers

NEED TO REMOVE DASH TO REPLACE HEATER CORE ON 1995 GMC SONOMA


yes you have to remove the whole dash assambly to replace the heater core..have fun i had to do mine twice.my new heater core lasted about 6 months.

Aug 01, 2008 | 1997 GMC Jimmy

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