Question about 2001 GMC Jimmy

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2001 gmc jimmy engine warm but heater blows cold air

2001 gmc jimmy heater problems

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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


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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

I have a 2001 GMC Jimmy and the heater motor on high.

If the blower only works on high than the blower resistor is usually the problem.

Here's a how to tip to help you figure it out.

Dec 05, 2010 | 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

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

2000 gmc jimmy heater core housing bolts

may be under hood on firewall

Jul 22, 2009 | 2001 GMC Jimmy

3 Answers

2000 GMC Heater Problem

I had problems with a similar truck,a 1998 GMC diesel after checking to make sure the control cables were operating the blend door and blowing the mess of the heater core,I replace the thermostats.Still no heat turns out there was a small amount of debris collecting in the fitting for the inlet hose at the thermostat housing after removing it and blowing out the lines the heat was fine.

Nov 19, 2008 | 2000 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

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