Question about 1991 Chevrolet S-10 Blazer

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How do you change the heater core in a 1991 GMC Jimmy 4X4

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You will have to remove the dashboard for that one but the core is usualy in the center left of the a/c core! good luck!

Posted on Sep 08, 2009

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Posted on Jan 02, 2017

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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

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Heater not working from my 97 GMC jimmy. Change


Do you feel heat on both heater core hoses? If not then it might have a blocked heater core, low coolant level, defective heater control valve or a blend door issue.

Jan 04, 2015 | 1997 GMC Jimmy

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I can't get heat in the cab, 2000 GMC Jimmy S15


well either your heater core lines are clogged ore the heater core is just bad

Jan 30, 2013 | 2000 GMC Jimmy

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Need pic how to change the heater core


you need a Movie for that Lol, anyway by pivoting dash forward you can gain access,look on U Tube

Jan 12, 2013 | 1991 GMC S-15 Jimmy

1 Answer

My heater core leaks coolant onto the floorboard of my s-15 jimmy from time to time. it does not do it all the time. do I need to replace it or is there another solution?


You can try a stop leak like Bars Leak, but chances are it needs replacing. Cores are usually aluminum or copper and they're fragile. Once they leak, it's usually terminal.

Jan 30, 2011 | 1991 GMC S-15 Jimmy

2 Answers

How to change heater core on a 97 jimmy


when i turn on my heater it kick out after a few min then come back on or sometimes not at all on my 97 jimmy 4x4

Jul 26, 2010 | 1997 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

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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