- #952 of 1492
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Re: 2004 Sierra Z71 clunking noise from rear [gmcbob]
by down2earth
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Feb 16, 2005 (8:06 pm)
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Replying to: gmcbob (Jun 20, 2004 10:26 pm)
I'm having the same trouble with 3800 miles. The service manager told me that he knew what it was, but no fix in place yet. I was in a hurry and didn't press for more info but will check back if I can remember to call tomorrow. The clunking isn't bad, yet, but it is annoying considering it is a new truck. Otherwise, I love the truck. Just switched from owning a Ford.
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- #953 of 1492
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Re: Button that allows outside air in the cab [repairman9]
by repairman9
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Feb 17, 2005 (11:47 am)
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Replying to: repairman9 (Feb 16, 2005 11:12 am)
Well, I just got off the phone with GM Customer Service and they told me that it took a design team to change the behavior of the recirculation switch to forget it's previous setting.
They pretty much told me to pound sand and if I even thought of changing it's behavior, they'd void my warranty.
Boy, they really told me. 
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- #954 of 1492
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Re: 2004 GMC Sierra 4WD Z71 drive train 14K miles [surrfurtom]
by bed
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Feb 18, 2005 (3:50 pm)
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Replying to: surrfurtom (Feb 16, 2005 11:48 am)
Thanks, I will suggest that to the dealer when I bring it in. Overall I have been happy with it. I looked at the Toyotas but felt I got much more truck for less money. And there was no comparison for space in the back of the cab between the two. My son in college has room to be comfortable back there. Good luck with your truck.
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- #955 of 1492
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Heater core problem???
by vegasammo
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Feb 21, 2005 (11:09 am)
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I have a 99' Sierra with 90K miles. The problem is after the engine warms up to an acceptable operating temperature, underneath the dash/glove box on the passenger side it sounds like boiling water when I accelerate?
It only does it when I accelerate from a slow rate of speed or from a dead stop? Has anyone ever heard of this type of problem? The temperature guage is reading normal? Could this be a heater core problem? Any help would be greatly appreciated, thanks!
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- #956 of 1492
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Re: 2004 GMC Sierra 4WD Z71 drive train 14K miles [surrfurtom]
by cw4915
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Feb 22, 2005 (7:39 pm)
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Replying to: surrfurtom (Feb 16, 2005 11:48 am)
my service 4WD light comes on intermittently. My truck is a 99, problem seems to be the selector switch on dash. each position has a resistor that allows different voltage signal to transfer case module. Bad info from a chilton manual told me to change the front diff actuator. we'll see if they reply to my letter because I cant return a electrical item to the dealer so I installed it anyway. I agree, GM needs to fix the theory behind the application instead of each occurence.
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- #957 of 1492
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Re: 2004 GMC Sierra 4WD Z71 drive train 14K miles [cw4915]
by surrfurtom
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Feb 24, 2005 (7:49 pm)
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Replying to: cw4915 (Feb 22, 2005 7:39 pm)
I'll have to look at my old records as that may have been the same fix as mine.
Common sense would say that GM, as the largest auto mfr in the world, would have a 1st rate quality control organization that would examine the root cause of failures and fix them.
Yet if you look at the poor reliability of many of their products in Consumer Reports, you can only shake your head in bewilderment. And its the same problems year after year.
There is only one reason that GM does not have the most reliable and highest quality car or truck in the world, and that is poor management.
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- #958 of 1492
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Re: 2500 HD 4x4 Transfer case problem [rcuevas]
by rawemm
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Feb 25, 2005 (11:45 am)
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Replying to: rcuevas (Dec 20, 2004 6:09 pm)
We have a 2002 Chevrolet Silverado 2500HD Duramax Diesel and just got it back from the dealer for the same problem. It has 90,000 miles and we noticed a leak that we thought was coming from the rear diff. After inspection at the dealer they said that a pump in the transfer case had failed and wore a small hole in the transfer case housing. There is a small spring on one ear of the pump that broke and allowed the pump to wear a hole in the housing. Sounds like a bad design to me. The dealer said that it had probably lost all the fluid within the first 5 miles that we drove it and caused all the bearings to freeze up on the shafts and had to replace the entire transfer case. To make matters worse, we had to wait 4 weeks for the transfer case because they are on national backorder and the manufacturer is having to find cores and rebuild them. We think that there is a huge problem with these transfer cases and GM is not letting anyone know. We would like to hear from anyone who has had this same problem. If we can get enough proof maybe some of us can get some reimbursement.
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- #959 of 1492
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Re: sierra sounds like it has an exhaust leak [tvrc18]
by alf2
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Feb 25, 2005 (8:02 pm)
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Replying to: tvrc18 (May 12, 2001 8:46 pm)
I know this is a reply to a very old question, but I've just bought a '99 Sierra and found the same clunk, thud or squawk (whatever you want to call it) coming from the rear end when I come to a complete stop and then again when I take my foot off the brake and start to accelerate. Did you ever find a solution to this? Thanks in advance.
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- #960 of 1492
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Heat control will not turn down or off
by darbo
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Mar 06, 2005 (6:42 pm)
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Temp controler will turn heat up or on but will not lower the temp or turn off. It will sometimes reset to the cold or off position after the ignition is turned off then engine restarted. Any ideas what the culprit might be? Control switch, electrical or maybe control motor? Any help appreciated.
2001 Gmc Sierra
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- #961 of 1492
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ABS Engages at low speed-97 Z71 4WD
by mikec8
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Mar 13, 2005 (6:13 pm)
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97 Z71, 4WD....Just before I stop, the front ABS makes a roaring sound, the pedal gets hard and kind of feels jerky. The truck doesn't feel like it will stop in time. If I press hard or quickly pump, I can get it to stop. It's intermittent and scary. Is this a simple fix like cleaning something or am I in for major work?
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