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Discussion Starter · #1 ·
I recently bought an 06 gmc lly with a 6 speed manual tranny. When i get up to around 75-80 mph the rpms are up around 2200-2300 and the service engine light comes on. At this point you cant go any faster....sounds like the thing is going to blow up. Whats the deal?
 

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Discussion Starter · #3 ·
no idea, dont have a programmer to me. guess i will have to take it to a shop to find out
 

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Take it to AutoZone, they will read codes for free... I would say don't have them clear the codes till you write them down and post them up.
 

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Discussion Starter · #5 ·
thanks. ill try and get that done tomorrow and get them posted.
 

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Discussion Starter · #6 ·
P0401. The guy at Auto Zone said it was insufficient EGR flow detected.
 

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That shouldn't be a big deal. In fact it shouldn't affect how the truck runs at all...

I'm wondering if there's something else going on here. How long has it been since you've changed your fuel filter just out of curiosity?
 

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Yep thats what it is. Go ahead and clear it. If it comes back on the EGR is probably stuck closed, it's happend to a couple trucks... Most people block the EGR off anyway and I suggest you do the same. Its a good idea to block it off.
 

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Discussion Starter · #9 ·
I just bought the truck two weeks ago and the guy gave me list of all his oil changes and fuel filter changes so ill look at it again but im pretty sure it didn't need a fuel filter for a while but when i get around to it im going the change all the fluids myself anyways. So if i go ahead and block the EGR will my service engine light stay on?
 

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Yes. The only way of keeping a check engine light from coming on is to block the codes with EFI Live, Some tuners, and KDs fingerstick
 

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Discussion Starter · #11 ·
Thanks Ben. I appreciate all your help man. Thats a kick ass truck in your display pic btw.
 

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good luck with the codes and dont ever get rid of that truck. 06 6-speeds are almost non existant. thats why im making my own :drink btw, lets see some pics..
 

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^^^ x2!! You have probably THE most desireable of all dmaxes :) Hang onto that sucker, and if you ever decide to sell it, call me first lol
 

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Sure bud, Thats not my truck though... Its the truck from transformers lol your not the first to compliment it though lol
 

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Discussion Starter · #16 ·
Ill try to get some picuters up sometime if I can figure it out. Right now the exterior it all stock. When i saw '06 duramax with a manual tranny on craigslist it didn't take very long for it to be in my driveway...still setting on my 04 duramax is the only bad thing.
 

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still setting on? what do you mean by that?
 

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Discussion Starter · #18 ·
:help How do i add pictures? I thought I had it figured out but it said the file was too big to attatch
 

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Discussion Starter · #19 ·
By setting on i meant im trying to sell my 04 Dmax
 
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