camping man
Central Fla.
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Joined: 09/01/2001
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Mine changed when I lost my cat.,maybe a piece of your broke off inside. Sometimes they over heat and crumble inside. If your cat is gone, it'll smell like the old city bus exhaust, or an old tractor.
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Perrysburg Dodgeboy
Perrysburg, Ohio USA
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Joined: 12/06/2003
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Maybe it is just like when we went from leaded to unleaded and added a cat to the exhaust, the smell changed. If your truck runs the same don’t sweat it. As for changing out the injectors I have never seen a whole set go out at one time. It sounds to me like the dealer is finding a different way to bring his profits up.
Don
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Kenneth
Washington, the state
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Joined: 03/20/2001
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Glen
Try a different brand of fuel. There are differences between fuels, and if you buy regularly from one station, they might have switched suppliers. Several of the stations in one area may have the same supplier, so switch more than once if needed. The people at the station might know the supplier, or maybe just the name of the trucking company that delivers the fuel to them.
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erd04056
Where ever we park it
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Joined: 10/04/2005
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Have the injector balance rates checked. They should be within +or-4 in park and +or-6 in drive or reverse whit the engine fully warmed up. Although injector problems are considered rare on the LLY motors...it was a very common issue on the LB7 motors.
2005 Kodiak 4X4
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GMC_Man
Arkansas
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Joined: 07/08/2004
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erd04056 wrote:Have the injector balance rates checked. They should be within +or-4 in park and +or-6 in drive or reverse whit the engine fully warmed up. Although injector problems are considered rare on the LLY motors...it was a very common issue on the LB7 motors.
Being an '06, he should have the LBZ motor. I don't think its would be injectors in this late a year model. That was maining the 01 and 02 and some 03s. When I had my DMAX, ULSD did smell different than LSD.
2007 GMC Sierra 1500 Crew Cab Z71 with VortecMAX 6.0 V8 
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PAUL3500HD
N.W.Ohio
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Joined: 04/14/2002
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Mine is an 06 and has the LLY in it
Early 06's hadn't changed over yet
Not sure what he is smelling
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geewiz
Canada & Mexico
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Joined: 11/21/2003
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Yes it is a late '06 LBZ.
These are all good suggestions. As it is my first diesel, I am trying to learn what makes it tick.
I will report back after service, which is due soon.
Thanks,
Glen
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geewiz
Canada & Mexico
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Smell is gone...
I mentioned that service was due -- actually the"fuel filter life" had worked its way down to 0% and the "replace fuel filter" message came on each time I started up. This happened a couple weeks ago about the time the exhaust stared to smell. Co-incidence? I guess not. The Chev garage said my fuel filter was very dirty.
So I guess that was it. i will be more diligent next time.
Glen & Susan
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ACZL
UPstate,NY
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Joined: 10/09/2001
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chadsalt wrote:I think some of you guys are spending to much time 'sniffing' the exhaust.
"Diesel fumes make you horny!!"
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Dale_S
Saugus, CA
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I have an LBZ and noticed the smell changes depending on where I buy the fuel at. When i buy at the C* it smells like it always did, but if I buy it at the off brand place which is a few cents a gallon cheaper, it has a rank (Rotting) smell mixed in with the normal diesel smell.
2007 Chevrolet Silverado Classic 2500HD Duramax 6.6
2008 Jayco Eagle 299RLS
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