Last post on Jun 23, 2013 at 6:54 AM
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GMC Jimmy, SUV
#6 of 119 Temp. Sending Unit/ Normal Temp?
Dec 10, 2008 (1:56 pm)
My 99 Jimmy (4.3 Vortec) has been hesitating when first taking off from a stop only when engine is cold. I have replaced plugs and wires, cap and rotor, egr valve, fuel filter, had my fuel pressure and cat convertor tested (both good), and I just replaced my temp. sending unit. Before I was running at about 165 degrees, now I'm getting about 190 degrees after adding coolant that was lost after taking old unit out. Is that normal temp? And I think I added more coolant than I needed in resevoir, is that ok or should I take some out?
And a little tip if you're replacing your temp. sending unit, use a wrench to tighten new one, I used a socket to get old one out and i broke the wire connector off.
#7 of 119 Re: Temp. Sending Unit/ Normal Temp? [nljewell]
Dec 11, 2008 (5:17 pm)
Just drove my Jimmy for the first time since changing my temp. sending unit. It's Thursday night and I haven't drove it since Sunday night. It took off great with no hesitation. Finally. Cheap and easy part to replace too. The gallon of Dex-Cool was just a couple $ cheaper than the part itself. Hope this helps someone in the future.
#9 of 119 2000 GMC Jimmy Black Diamond NO HEAT
Jan 22, 2010 (8:16 am)
I changed thermostat even though temp was ok
changed cap as it was leaking. Flushed block
and heater core with garden hose, both had full
flow. I'm stumped. Any advise out there on what
next to check. This vehicle also has temp. control.
Thanks for the help.
#11 of 119 98 gmc Jimmy Heating Problem
Feb 09, 2010 (5:29 pm)
ok 98 gmc jimmy slt. i have some reoccurring heating problems and every year it seems the mechanic has to backflush the heating coil and replaces the thermostat. i know i can get the stat locally and would like to just change it. need to know where the stat is??? ive read a dif model was under the air intake/throttle. is that the right spot? i also have pumps at work available to backflush the coil. any other pictures or advice. im not real good at cars but hvac i know.
#12 of 119 Re: 2000 GMC Jimmy Black Diamond NO HEAT [heidenreich1]
Feb 14, 2010 (4:08 pm)
That sounds like your blend door motor is the problem. I have replaced it in troubleshooting my heater issues. On the climate control models this motor is located up behind your glove box. It can be replaced without removing the dash but takes a little patience to get it in. Cost me 80 bucks for one.
Feb 13, 2011 (1:18 pm)
Looking for anothercup1. Would like to know where he bought his air blend motor for his jimmy.
#14 of 119 air condition gas leaks off
Jul 05, 2011 (5:42 pm)
I can fill up my air condition system but only lasts a couple weeks or mor then goes empty. Replaced compressor and all oil seals. Cant find out where its leaking .maybe it's the evaporator under the dash compartment or in the coil nest to the radiator. How can I get this checked. Would appreciate any suggestions.