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GMC Jimmy Climate Control Problems

82 messages,  Last post on Oct 11, 2009 at 6:56 AM

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What is this discussion about? GMC Jimmy, Heating / Cooling, SUV

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#43 of 82 A/C Problems by rpducros2 Aug 21, 2006 (9:27 am)
Any problems with your A/C ... talk about it here.
#44 of 82 A/C Not working properly. by rpducros2 Aug 21, 2006 (9:30 am)
Ok here is my problem. Its going to sound very strange. A/C works decently at night. blows around 60F. During the day im lucky to get 65F. The strange thing is, The higher the fan speed ... the hotter it blows. the lower the fan speed the cooler it blows. I checked the compressor levels, i have everything in the green on both high and low side. All my pipes going to and from compressor/accumulator are cold and sweating. Anybody have any ideas ? Could my A/C be sucking hot air from somewhere ? IM totally stumped. Any ideas are welcomed. Replies to this message: repairdog (Aug 28, 2006 1:45 am)
#46 of 82 2003 Trailblazer A/C problem by jglong Aug 27, 2006 (12:23 pm)
My '03 Trailblazer constantly reads inaccurate actual outside temperature. For example, here in Oklahoma we've had 30+ days of 100 degrees or higher, but my Trailblazer never reads more than 50 degrees. Consequently, my A/C sucks.   What do I need to replace/check? Replies to this message: repairdog (Aug 28, 2006 1:47 am)
#47 of 82 Re: A/C Not working properly. [rpducros2] by repairdog Aug 28, 2006 (1:45 am)
Replying to: rpducros2 (Aug 21, 2006 9:30 am) Never said year but yes the recirc door could be stuck or actuator bad. If you have climate control there is also a blend door - with AC problems I go to the shop after checking connectors - too many interlated problems. But also check the vac hoses under hood on drivers side for rot - the lower one Ts off )plastic one) to the AC.
#48 of 82 Re: 2003 Trailblazer A/C problem [jglong] by repairdog Aug 28, 2006 (1:47 am)
Replying to: jglong (Aug 27, 2006 12:23 pm) There is a temp thermistor believe up by the radiator (is on Blazers) that feeds the readout and if bad or way out of cal will screw the AC up.
#49 of 82 2000 Jimmy: No Heat by il203 Sep 25, 2006 (8:28 am)
My 2000 Jimmy (97K miles) heat does not work. Only ambient temp air blows out. A/C works fine. Checked temps on all Radiator hoses and hoses going in and out through fire wall. Temps from 130 - 200 degrees. Thus, some heat should come out. Checked with vacuum gage that the all vent doors worked. No apparent problems. Pulled front dash off and can see the blender door motor pin rotates when the temperature adjuster is turned from hot to cold and back. No change in air temp though. The amount of air flow does decrease when changing temp knob from cold to hot. Thought is the blender door is stuck or broken. However, getting to the blender motor looks like a challenge. Any advice on what the problem may be and what to do next. Replies to this message: repairdog (Sep 25, 2006 2:04 pm)
#50 of 82 1997 Gmc Jimmy AC Problem by georgetown Sep 25, 2006 (9:25 am)
I have a problem with my Jimmy. When I turn on my ac the ac compressor turns on but there is no air coming out of the vents. Sometimes the air will blow for the first 3 minutes when I turn on the ac but it will always turn back off and I can still here the compressor on. Anybody heard of this before? Replies to this message: repairdog (Sep 25, 2006 2:07 pm)
#51 of 82 Re: 2000 Jimmy: No Heat [il203] by repairdog Sep 25, 2006 (2:04 pm)
Replying to: il203 (Sep 25, 2006 8:28 am) Sorry, sounds like the classic clogged heater core so no water flowing thru it - have to flush and hope it doesn't leak or blow a hole - another Blazer defect, oh did I say that - Dex cool should be flushed evetry 3 years min and any air in the system it gels up. Search on clogged heater core and I've posted the flush several times. Good luck cause the heater core is dash out and over $500. No help after 5/75 or so by GM but if before for others they pay half if you ask for zone to review.
#52 of 82 Re: 1997 Gmc Jimmy AC Problem [georgetown] by repairdog Sep 25, 2006 (2:07 pm)
Replying to: georgetown (Sep 25, 2006 9:25 am) Take it an AC shop and have them look at the R134 level, could be low, the pressure switch bad, or a loose connector. Not easy without AC gauges to find. If 97 and over 80-90k miles the compressors blow the front seals, another GM quality part so get a NEW compressor, not rebuilt or it will die within a year.

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