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2001 GMC JIMMYS HEATER WONT BLOW HOT AIR AND DEFROST WONT WORK

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: 2001 gmc jimmy engine warm but heater blows cold air

Disconnect the heater hoses from the water pump and the intake manifold. Get a compressor and blow out the hose (put the air hose into the the hose that came off the mainfold. then flush the system and replace the antifreeze.

Posted on Dec 12, 2008

OLDERQT
  • 1 Answer

SOURCE: 93 gmc sierra heater not working

THERMOSTAT REPLACE IF NOT SEE IF HOSES ARE CLOGGED SHOT OF AIR COULD HELP OR DISSCONNECT BATTERY CABLE 10-15 MIN CONNECT BACK TRY HEATER

Posted on Jan 04, 2009

picatudo
  • 239 Answers

SOURCE: 2001 gmc jimmy defroster-heater blower will not direct heat

you have a vacuum leak

Posted on Jan 07, 2009

cadman000
  • 607 Answers

SOURCE: a/c and heater only blow air out of defrost

sounds like there is a vacuum leak, possibly under the hood.. Vaccumm is needed to change the mode doors.

Posted on Mar 30, 2009

  • 7 Answers

SOURCE: when i have the heater/defroster on the heater

It sounds like you have a blend air door stuck. This is in the housing of the heater a/c blower unit under the passenger side of the dash. There is a motor on the top of the housing that could possibly be stuck or on working.

Posted on Sep 05, 2009

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3 Answers

My 2000 jimmy has heat problems. the heat goes from cold to hot to warm to cold etc. what could the problem be?


If the temp gauge is now more stable, the problem is in your heater system, not the engine cooling system.

Sep 12, 2014 | 2000 GMC Jimmy

1 Answer

My 2000 gmc jimmy blow cold air heater


common for this vehicle to have clogged heater core

Dec 16, 2012 | 2000 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

2001 gmc jimm running hot


You have air in the system, you will need to work that out, some engine have cooling systen bleeders, if not loosen a heater hose to bleed air from the system.

Mar 16, 2010 | 2001 GMC Jimmy

4 Answers

My 2001 GMC Jimmy is not blowing warm/hot air. The temperature is slightly elevated but not overheating. When going uphill sometimes will blow warm air but for short period of time. Coolant levels are...


Let the vehicle warm up to normal operating temprature, touch the heater hoses going into the firewall to the heater core, they should both be hot, if only one is hot the heater core is stopped up. If this is the case you will want to try flushing it before you replace it. If you have to replace it be prepaired to spend $400.00 or more depending on shop rates. NOTE: BE CAREFULL WHEN CHECKING HEATER HOSES YOU COULD GET BURNED! Thanks and good luck with your repair.

Nov 06, 2009 | 2001 GMC Jimmy

1 Answer

1998 GMC Jimmy SLT warm air only from heating ducts


if you claim that your heater core is flushed properly then my bet is the temp regulator is bad.

Jan 13, 2009 | 1998 GMC Jimmy

1 Answer

My defroster is blowing out hot air but not defrosting my window


Bizarre. It is blowing hot air? If so are there vents you can change direction towards windshield?

Dec 29, 2008 | 1996 GMC Jimmy

1 Answer

Fogging up issues


If you can feel the air from the blower motor blowing up on the windshield it is probably one of two things. Either your heater core has a leak and the anti-freeze mist film is all over the windows or your heater control valve is not working.
Does the heater get hot or can you feel hot air on the windshield? If so your heater core is probably leaking and making steam inside your car.

Dec 22, 2008 | 2001 GMC Yukon XL

1 Answer

2001 gmc jimmy engine warm but heater blows cold air


Disconnect the heater hoses from the water pump and the intake manifold. Get a compressor and blow out the hose (put the air hose into the the hose that came off the mainfold. then flush the system and replace the antifreeze.

Dec 11, 2008 | 2001 GMC Jimmy

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