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Go Back   Chevy and GMC Duramax Diesel Forum > Specialty Forums > How To's, DIY and Write ups > DIY and Tech discussion

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Old 09-18-2008, 08:05 AM   eBay Motors  #1 (permalink)
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Fixed dual climate control!

I posted this in another Thread...I don't know but Hope it will work for you.
Make sure the Unit has not thrown any Codes...
1. With Truck off
2. Pull the HVAC/ECAS fuse (under the hood) for at least 20 seconds, if you don't have a watch you can count to 22 Mississippi
3. Put the fuse back in place...
4. Put key in and start the truck...
5. DO NOT TOUCH A DARN thing...(That’s what caused my problem after dead battery)
6. After 1 min. the ac control module should self-Calibrate...

This is how the guy fixed mine, I watched and counted so I may be off by a few seconds...Hope it works for you. I've got Cold air just in time for winter
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Old 09-18-2008, 10:30 PM   eBay Motors  #2 (permalink)
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Wow thanks for that! I never had a problem yet but I hear of a ton of people with problems! Ill have to reffer questions to this thread!!
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Old 10-16-2008, 06:15 AM   eBay Motors  #3 (permalink)
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dual digital temp

so did that fix, but still messes up when i change the temp ...driver side seems to work, but pass side if you change from driver side setting...well goes to full hot..any ideas? also you know much or have had to deal with faulty gauges? got a volt gauge that is pegged now...2005 k2500. trip dog. 5" from downpipe.....
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Old 08-08-2009, 08:00 AM   eBay Motors  #4 (permalink)
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I'm glad I posted it, I had a bat go bad and then when I replaced it, it went dummy on me... So I'm like how did I fix it last time. and I rememberd I made this! YA ME!
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2005 Chevy 3500 4x4 SLT Crew Cab, L O N G BED! Leather, Integrated DVD Player,"you know, for the kids!" Banks CAI, PPE ECON stage 2 Installed by BigRedChevy; MBRP 4" SS. Dead CAT Kept the MUFF, Modded turbo mouthpiece
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Old 08-08-2009, 08:17 AM   eBay Motors  #5 (permalink)
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as for amo messed up gauges are VERY common it is the stepper motor that moves the needle on the gauge you can remove and solder in a new one or buy a new cluster.
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Old 01-11-2010, 08:41 PM   eBay Motors  #6 (permalink)
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I had the same problem with my HVAC when i replaced the bats, so I took apart the dash and disconnected the control module for about 10 mins put it back in and it worked.
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