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#1
08-25-2008, 05:57 PM
Hummer Expert
Join Date: Apr 2006
Location: cary nc
Posts: 765
08 Alpha rear dif problems
Ok I have about 11500 on my truck and the rear dif light along with service 4wd light came on. I took it in and they replaced the electric coil (high resistance) in the locker along with the carrier bearings (worn due to excess heat from coil).
Got it back and 10 miles off the lot the service 4wd light came on along with a blinking rear dif light.
I took it back and they replaced the wiring that goes from my locker button to the rear dif. I got my truck back and 10 miles off the lot the service 4wd light came on with a blinking rear dif button.
They tell me that this has been a common problem(1 out of 5 08 advs) but never to this extent. Any techs have any suggestions?
#2
08-25-2008, 08:06 PM
Hummer Guru
Join Date: Jan 2004
Posts: 7,060
Re: 08 Alpha rear dif problems
If this happens to 1 out fo 5 (which I find very hard to believe) that should have had this fixed the first time.
This is the first I have heard of this isue with the ALpha.
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#3
08-25-2008, 10:26 PM
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Join Date: Dec 2005
Location: In a FREE U.S.A. where Marxism, Socialism & Communism is not allowed !
Posts: 5,485
Re: 08 Alpha rear dif problems
I think you should have bought a 5 banger ...
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#4
08-25-2008, 11:27 PM
Hummer Guru
Join Date: Jan 2004
Posts: 7,060
Re: 08 Alpha rear dif problems
Quote:
Originally Posted by RubHer Yellow Ducky
I think you should have bought a 5 banger ...
5 banger's are for yellow bus driving -OLD A$$ lookin- mall wheelin- sissy owners. 
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#5
08-26-2008, 01:34 AM
Hummer Professional
Join Date: Sep 2006
Location: Arkansas
Posts: 363
Re: 08 Alpha rear dif problems
I had a problem with an 06 I-5 H3. The black potting material is normal but the coil can be fried. I don't think it has anything to do with it being an Alpha with a 5.3 liter V8. Somehow I think before the coils got hot enough to destroy bearings they would have blown a fuse.
Come on Timco, let it out tell us how you really feel
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Last edited by Hunner : 08-26-2008 at 01:42 AM.
#6
08-26-2008, 07:13 PM
Hummer Guru
Join Date: Jan 2004
Posts: 7,060
Re: 08 Alpha rear dif problems
Quote:
Originally Posted by Hunner
Come on Timco, let it out tell us how you really feel
Oh, it just RYD....I guess I shouldn;t be so harsh. He is getting up there in age. 
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#7
08-26-2008, 08:18 PM
Hummer Expert
Join Date: Apr 2006
Location: cary nc
Posts: 765
Re: 08 Alpha rear dif problems
No. The problem supposedly isn't with the alphas; it's on all 08 adventures I5 or V8.
It turns out that the last warning light was because there was a small nick in the wire that went from the fuse box to the rear locker module. It was due to over clamping the metal clip that help it in place.
It's fixed now, so I'm happy. I just wanted to let you guys know in case it happens to you.
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