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Old 06-23-2015, 03:48 PM
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'05 GMC DuraMax - what do you think

I've found a 2005 GMC P/U, under 60k miles with 6.6L DuraMax and Alison transmission that I'm considering buying for a tow vehicle. I assume there are folks around with some real world experience with this engine/trans. Going to use it this coming weekend on my typical 300 mile round trip as a demo.
Looking for input good or bad on the motor and trans. I know it's got plenty of power to pull an older Prostar - but have a couple of friends that had issues with their diesel trucks and it was expensive repairs in both cases.


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Old 06-23-2015, 03:57 PM
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although I am a Cummins guy, if I were to ever move away from a Dodge, Chevy/GMC with a DuraMax would be my next choice. I have heard really good things about the DuraMax & Allison combo as long as you keep clean fuel & fuel filters but trash in the fuel will destroy the injectors/system very quickly. But I am guessing that would be pretty much the case with any of the newer higher pressure diesels. Both my dad and father in law were die hard Chevy/GMC guys (FIL was GMC/Pontiac dealer in the 50s/60s) and I was almost disowned when I got my first Dodge in '91 (9 since that one) ... and I always said if I could custom order a truck, it would be a Chevy/GMC 2500/3500 SRW with a Cummins drivetrain. Chevy/GMC drive and wear great!
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Old 06-23-2015, 04:05 PM
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I work on these things daily. I'll post back tonight with more info.


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Old 06-23-2015, 04:42 PM
Cloaked Cloaked is offline
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I have had three of the diesel burners (01, 02, 07) and 2 of the three have had inherent injector issues. Just a matter of when, The 05 is the best year of the engine era from 01-06 - LB7, LBZ). The 07.5 changed entirely, going forward.

Your low mileage 05 (LBZ engine model) find is an OK truck of all the ones I have known and owned. I would not touch another LB7 if you paid me to take it.

The Allison is the deal. Engine is a typical plant but the Allison is the real deal (electronic shift). If it's a decent price, I'd snag it. I sold my 07 (LLY engine) in 12 for $36K with fifty-five hundred miles on it (5,500) and got into a 12.

==> http://www.kennedydiesel.com/categor...cfm?Category=4 <== for some simple info and pricing on injectors.

I bought a 2012 Tundra in 2012, kept it for four months (thus the 2012 GMC) and I'd take the 05 LBZ over that any day. I give your find two thumbs up if it is a nice machine, etc.
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Old 06-23-2015, 05:34 PM
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If a prostar is the biggest thing you tow then I'd get a newer half ton. Unless you just want the 2500 diesel (nothin wrong with that).
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Old 06-23-2015, 05:38 PM
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05 is lly not lbz.. That was 06-07.5


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Old 06-23-2015, 06:34 PM
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Old 06-23-2015, 06:36 PM
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05 is lly not lbz.. That was 06-07.5


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ok ................


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..Some of you give a whole new meaning to the phrase "another @sshole with a Mastercraft."

RE: Thrall, Welcome to the club....


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Old 06-23-2015, 06:37 PM
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Don't be skEErt to speak up. Popcorn is passive. Man up
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..Some of you give a whole new meaning to the phrase "another @sshole with a Mastercraft."

RE: Thrall, Welcome to the club....


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  #10  
Old 06-23-2015, 06:58 PM
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ok ................


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So are you agreeing with me on this or ?


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