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01-20-2016, 07:20 AM | #31 | ||
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Re: 00' Silverado no heat
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As for the hunting idle RPM, surging and stalling, it could be time to clean the throttle body, idle air control passages, and remove the idle air control to disassemble, clean, and lubricate it. I JUST went through this on an '05 with the same kind of symptoms, and that's all I did to rectify it. It hasn't been quite as cool here as in Eau Claire, but as soon as it hit about -10°F the symptoms began. There was just enough varnish buildup on the IAC stem to make it sluggish to the point where the PCM was trying to "chase" the idle RPM with air adjustment but the IAC couldn't react quickly enough. It would hunt from OVER 2,000 RPM to stalling, even in neutral. Once the IAC was cleaned/lubed/reinstalled it immediately went back to normal (No, not Normal, Illinois, only Rockford). This may be of some help: http://www.automotiveforums.com/vbul...67&postcount=7
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01-20-2016, 08:47 AM | #32 | |
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Re: 00' Silverado no heat
I'v had the same issues on my 00 silverado z71. I back flushed my heater core and gunk come out of it. I'v had to do it once a year about this time. I still use the dexcool and just use regular tap water. Could regular tap water make the dexcool gunk up over time? Once I backflush, it works great though.
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01-20-2016, 08:55 AM | #33 | ||
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Re: 00' Silverado no heat
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01-20-2016, 09:10 AM | #34 | |
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Re: 00' Silverado no heat
ok.
Thanks for that info. Sounds like I need to do a flush & blow and replace with Distilled water next time. If you've had that good luck, then I need to try it. Should the same water be used with the "Green" antifreeze as well?? |
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01-20-2016, 05:08 PM | #35 | ||
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Re: 00' Silverado no heat
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so in 1996 I continued with the distilled in my new 96 impala and then in 2000 the silverado no coolant problems distilled water does work.. drinking water has too many metals and corrosive bacterial killers .. the dexcool is replaced every 4 yrs . |
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01-20-2016, 09:35 PM | #36 | |
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Re: 00' Silverado no heat
I've been mixing my own distilled water 50/50 mix for more years than I can remember.
There is a graph on each antifreeze bottle that shows what the % mixture should be for the temps expected. You can buy a 50/50 pre-mix at most parts stores, but I'm not sure what kind of water they use for the mix?? Bottom line is always use distilled water and do not mix colors!!
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01-21-2016, 07:10 AM | #37 | ||
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Re: 00' Silverado no heat
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03-16-2017, 06:18 PM | #38 | |
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Re: 00' Silverado no heat
i have a 2000 silverado with 5.3.ihave heat temp seems to be normal but anti-freeze smell all inside.it is not leaking in the floor but when running just below the a/c dryer there is a hose coming out of the firewall that is dripping 1 drip every 3 seconds.is it a clog or leaking heater core.
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03-16-2017, 09:34 PM | #39 | ||
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Re: 00' Silverado no heat
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03-17-2017, 05:27 AM | #40 |
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Re: 00' Silverado no heat
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03-17-2017, 08:49 AM | #41 | |
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Re: 00' Silverado no heat
if you fix it make sure you use distilled water no drinking water . use 60% antifreeze not less than 50%.. this takes about 4.25 gallons of coolant so if you drain the block completely this will require 2.5 gallons of antifreeze 100%. many flush the coolant system then not drain out the block then add about 1.5 gallons of the 50/50 mix.. that is very damaging which then causes the metal to corrode .. 60 % antifreeze is all about corrosion not about arctic air temps . before you put it all back make sure that heater core does not leak.. some have had them leak ..
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