lookin for a durmax... - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 11 (permalink) Old 01-04-2009, 04:50 AM Thread Starter
 
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lookin for a durmax...

Hey,

I am looking to join the fun and get a durmax like a lot of you guys. The budget isn't great, but I've waited long enough and the times right.

So just lookin for some advice on what so look for, or stay away from such as:

year?
# miles?
engine?
tranny?

is there any specific model or mileage like 200k where stuff tends to crap out? Or isn't that a concern. Thanks for any help.
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post #2 of 11 (permalink) Old 01-04-2009, 06:20 AM
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I'm not a Chevy guy but I do have a buddy who is die hard and I read up on the Chevs quite a bit. From what I've read, avoid the 2004.4 to 2006 models which are the LLY engines. They tend to overheat and it's hard to find the cause. The 2001- 2004.5 LB7 had a few injector issues but I believe that got cleared up and the 2006.5 to 2007.5 LBZ are pretty good. LBZ's have the 6 speed auto vs. the 5. If it was me buying a chev on a tight budget, I would go with the 01-04.5 LB7. As for the tranny, I think the Allison is overrated. The Ford Torqshift holds up to way more power as the Allison will start to slip or go to limp mode with a decent tune. Again, I'm a little bias though.

Hopefully some Chevy guys will chime in as more and more people get their names back and start posting again.

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post #3 of 11 (permalink) Old 01-04-2009, 06:34 AM
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Originally Posted by ADubDiesel View Post
I'm not a Chevy guy but I do have a buddy who is die hard and I read up on the Chevs quite a bit. From what I've read, avoid the 2004.4 to 2006 models which are the LLY engines. They tend to overheat and it's hard to find the cause. The 2001- 2004.5 LB7 had a few injector issues but I believe that got cleared up and the 2006.5 to 2007.5 LBZ are pretty good. LBZ's have the 6 speed auto vs. the 5. If it was me buying a chev on a tight budget, I would go with the 01-04.5 LB7. As for the tranny, I think the Allison is overrated. The Ford Torqshift holds up to way more power as the Allison will start to slip or go to limp mode with a decent tune. Again, I'm a little bias though.

Hopefully some Chevy guys will chime in as more and more people get their names back and start posting again.
the lly's are from 04.5-05, the 06 lly is a de-tuned version of the LBZ

if you want cheap, reliable and the best... 03-04 LB7, its the newer bodystyle and the injector warranty will be longer due to it being a newer truck

the tranny's arent great with over stock power, however $2000 in parts and you have one of the toughest transmissions out there

Aaron the Crazy Canuck
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post #4 of 11 (permalink) Old 01-04-2009, 07:03 AM
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See I told you a Chevy guy would chime in.

BriteWhite, did you get your old name back or do you have 450+ posts since the hack?

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post #5 of 11 (permalink) Old 01-04-2009, 01:44 PM
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01-04 LB7 have injector issues, but are still a great engine.

04-06 LLY Have had overheating issues, but there are some great fixes out there now!

06-07.5 LBZ Strong motor with the six speed auto.

All of the auto's will at some point need modded if you add more power to the engine in the form of tuners. The LB7 and LLY are both 5spd auto's but can be modded to a 6spd with a kit from Suncoast Converters.

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post #6 of 11 (permalink) Old 01-04-2009, 03:41 PM
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See I told you a Chevy guy would chime in.

BriteWhite, did you get your old name back or do you have 450+ posts since the hack?
i have 450+ posts since the hack, and still have my original name had 1800 post before the hack

to original poster,

If your budget isn't great i would really look into a 01-04 lb7, they are just a reliable, proven, strong motor, they dont have any emissions controls and are much simpler than the lly and lbz

Aaron the Crazy Canuck
2006 Chevrolet Silverado LT 2500: LBZ - Allison, Greystone Metallic, 4x4,PPE airbox mod, missing muffler/cat, EFILive tuned by Nick at duramaxtuner, MA tie-rod sleeves and Grade C headgaskets
Totalled!! May 2nd 2008-2005 Dodge Ram 3500 laramie: Cummins auto, plain white, rebuilt tranny
1986 Mercury Capri - 5.0L, AOD, shorty headers, acell ignition, Holly street dominator intake, Holly 625 vacuum secondaries carb, Dual glass packs "my little yellow terror"

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post #7 of 11 (permalink) Old 01-04-2009, 04:15 PM
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post #8 of 11 (permalink) Old 01-04-2009, 04:24 PM Thread Starter
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thanks for all the info, I will take it into consideration....

I am located just north of the twin cities in MN.

I have been looking, if any of you have any advice on where else to look I would do that too.
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post #9 of 11 (permalink) Old 01-04-2009, 06:34 PM
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Start looking thru AutoTrader for trucks near you.

If you can afford it, look for a 2006 LBZ first. Great overall package.

If your budget is tight, go with 03-04 LB7, for two reasons. 1) injector warranty still has time, 2) the vehicle electronics were updated.
Choose a 01-02 LB7 if you dont have any worries about doing injectors yourself.

04.5-05 LLY would be a good compromise. The overheat issues do not affect every Duramax, but for the ones that do have the issue, its been fixed with killerbee's and TxChristopher's modifications.

Last edited by TheBac; 01-04-2009 at 06:37 PM.
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post #10 of 11 (permalink) Old 01-04-2009, 07:41 PM
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Quote:
Originally Posted by BriteWhiteRam View Post
i have 450+ posts since the hack, and still have my original name had 1800 post before the hack

to original poster,

If your budget isn't great i would really look into a 01-04 lb7, they are just a reliable, proven, strong motor, they dont have any emissions controls and are much simpler than the lly and lbz
I agree with you Aaron, except for the emissions equipment. Any LB7 with the California emissions standards (which a lot of states follow) will have an EGR and a Catalytic converter.

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