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Duramax 6600 Discussion Forum for the Duramax 6600 Diesel Engine, including the LB7, LLY, LBZ & LMM engine specific topics.

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  #1  
Old 07-27-2009, 02:02 PM
JohnnyR JohnnyR is offline
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Default Airbox on LLY

I have a 2005 with the LLY engine. Seems I remember reading that changing out the stock air intake box improves/lowers engine operating temperature somehow, especially towing. Am I remembering correctly and what does one replace it with?
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Old 07-27-2009, 05:21 PM
DmaxMaverick DmaxMaverick is offline
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Arrow

There is marked improvement upgrading to the 2006+ filtration/ducting system. Some modification is required.
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  #3  
Old 07-27-2009, 06:23 PM
Grayfox Grayfox is offline
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Default airbox 05 d-max

I had mine replaced on my late 05 GMC and it made a nice difference, not only in cooling but, in better fuel economy. GM took care of the cost under a service bulletin. Search this site .. I know there is plenty of info available. Take your Max to your dealer they can research it for you... IF you have a dealer looking out for the customer.
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  #4  
Old 07-27-2009, 08:31 PM
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Duramaster Duramaster is offline
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Arrow Over heat.......................

Here is the bulletin.............................


#06-06-04-036D: Engine Overheats or Runs Hot in High Ambient Temperature When Towing or Hauling on Long Inclines (Install 2006 Air Cleaner Assembly) - (Jun 4, 2007)



There is a software upgrade that goes along with it.
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Old 07-28-2009, 11:45 AM
JohnnyR JohnnyR is offline
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#06-06-04-036D: Engine Overheats or Runs Hot in High Ambient Temperature When Towing or Hauling on Long Inclines (Install 2006 Air Cleaner Assembly) - (Jun 4, 2007)

Can't say mine runs hot. Did see it go above 210 once for a short period pulling a long incline. Do notice fan kicks in a lot when towing in hot weather and tranny temps get up to 195 pretty easily. Does that meet the bulletin criteria to get GM to replace airbox? By the way, I've got about 85K miles. I assume this might be covered un der the 100K warranty?
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Old 07-28-2009, 06:22 PM
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The document doesn't really say if it is covered under the 5 year/ 100k mile warranty. I would assume so. There are several checks that have to be made before performing the repair. Send me your personal e-mail in a private message and I will send the document to you.
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Old 07-29-2009, 11:31 AM
JohnnyR JohnnyR is offline
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Duramaster

Sent you a PM w/address.
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  #8  
Old 09-22-2009, 12:20 PM
JohnnyR JohnnyR is offline
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Guys, my dealership said the airbox replacement (bulletin # 06-06-036D) is only covered by the 36K bumper to bumper warranty, not the 100K diesel engine warranty. I've got about 86K miles on truck. Called GM customer assistance and they couldn't even find the bulletin and referred me back to the dealer with no answer. Does anyone know the correct answer?
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  #9  
Old 09-22-2009, 04:03 PM
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JohnnyR, I think the 3-36 is correct, @ least my dealer used that as to why GM would not do the update.
So I did the update. I now have less smoke, I use and edge and boost stick so some smoke on brisk accel happened but not now with the larger intake.
However my question was do I need the reflash, I have not yet done the reflash, and was told by one on this forum that maybe would not need it. I am still watching mileage and power to decide if I try the reflash.
I hope that it does help temp because I do pull heavy and have had temp issues. A larger Allison spec cooler under the truck helped keep trans temps @ 210max on hard hot pulls but engine temp may still be an issue.
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  #10  
Old 09-23-2009, 07:58 AM
JohnnyR JohnnyR is offline
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Carco
So what was cost of update kit and how difficult was it?
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