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Old 07-21-2013, 02:03 PM   #1
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Duramax/Allison longjevity

We have an 05 GMC with a Duramax/Allison setup- We have surpassed 100k without any major repairs- I am curious as to what experiences others have had? We have replaced several normal maintenance items such as u-joints, hanger bearings, batteries, and tires- We also replaced the water pump- We do need to have the dash gauges repaired but that is all I am aware of that needs taken care of- All replies welcome- THANX in advance- JMHO- DD
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Old 07-21-2013, 02:50 PM   #2
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Talking diesels with a retired diesel mechanic from Oregon recently, he said you should get 200,000 miles without any major repairs or you have a lemon.

Also, talking with a friend of my sister, he has the Ford 7.3L 2000 model year. He said you should get 200-250,000. He has 160,000 and said it's just broken in :-)
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Old 07-21-2013, 03:01 PM   #3
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My FIL has a 2001 Duramax dually. At around 100K he had to put injectors in, a $4200 repair. But I think the injector issue was limited to certain years. Other then that he has had good service from it.
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Old 07-21-2013, 03:25 PM   #4
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117,000 on my 05 Duramax/Allison and only thing other than routine maintenance on transmission, oil/filter change, fuel filters was a rear seal on the right rear axle (200.00). I realize things could break tomorrow but confident that, after I replace the original serpentine belt soon just because I don't want to push my luck, 200,000 is going to happen without any major mechanical issues.
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Old 07-21-2013, 04:25 PM   #5
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My 2007.5 LMM just turned 100k and knock on wood no issues other than routine maintanence.
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Old 07-21-2013, 08:47 PM   #6
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I have 158,000 miles on my 2004.5 LLY and only routine maintenance so far as well.
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Old 07-21-2013, 09:35 PM   #7
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Go to duramaxforum.com and become a member. Lots of knowledgeable people on their with an answer to any problem you might have. Lots of trucks with lots of miles. One guy on there has 600,000+ without any major repairs. You take care of your truck and it will take care of you.
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Old 07-21-2013, 09:46 PM   #8
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Quote:
Originally Posted by dg1971 View Post
117,000 on my 05 Duramax/Allison and only thing other than routine maintenance on transmission, oil/filter change, fuel filters was a rear seal on the right rear axle (200.00). I realize things could break tomorrow but confident that, after I replace the original serpentine belt soon just because I don't want to push my luck, 200,000 is going to happen without any major mechanical issues.
You should also do both idler pulleys and belt tensioner pulley.

I had a pulley freeze up on me just as we pulled into a campsite. Not fun backing in the trailer without power steering because I had to remove the belt. I also got lucky it didn't damage my fan when it got tangled around it after coming off when the pulley froze up.
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Old 07-21-2013, 10:27 PM   #9
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The key word in a lot of these posts is "maintenance". If the truck is properly serviced and small items taken care of it should be good for a long time. Even a seemingly big repair bill equals to just a few months of payments on a newer truck.
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Old 07-21-2013, 11:27 PM   #10
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Quote:
Originally Posted by dieselmann35 View Post
You should also do both idler pulleys and belt tensioner pulley.

I had a pulley freeze up on me just as we pulled into a campsite. Not fun backing in the trailer without power steering because I had to remove the belt. I also got lucky it didn't damage my fan when it got tangled around it after coming off when the pulley froze up.
You also dont have power brakes at that point...
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