[rhurley]

I just recently learned that the emissions here in Colorado are a visual check to see that the components are present and intact and a visual of the exhaust for opacity. They do not plug into the OBD2 and check anything. The delete turns everything off and you leave it in place. You can hollow out the DPF and re-install the pipe, or get another DPF to hollow out and keep the original on the shelf for if/when you might trade it in at the dealer. In theory your mileage should increase considerably after the delete.

I know that I am planning on doing mine once I get the cash together, kind of broke right now. I am really fed up with the constant regens all of the time; and the stock 'gas' pedal really sucks too.

They do plug in to see if the EGR is in tact. I have dealt with Colorado diesel emission for the past 7 years. They are very strict. and I have yet to find a shop that would just "pass" on visual

 

[Anthony Cusanello]

i passed mass inspection fully deleted...they plugged in and everything, granted i knew the guy who did it but still, he plugged it in.

also, my def fluid drained itself as soon as i started my truck after deleting it.

 

[LML6600DMAX]

I think the easiest thing for you is just to do a emission compliant tune from atp or duramaxtuner.
Supposed to be cleaner than factory and the only thing that would concern me is the added heat from the hot tunes.

 

[Thatmarkguy]

What is your MPG? At 75-80 mph I am getting 20+.

This is what I don't understand - You, like my friend has an identical truck to mine, also a 2011, but it's a GMC Denali, both are 2wd and on the same road, driving the same speed he get's 21 mpg when I was getting 14.5 mpg. He goes into regen every 600-700 miles and I before I deleted it was every 200-300. I don't know why there is such a disparity between trucks. Now mine hauls ass while he still chugs along, but now I get 18-19 mpg on the highway at 80-85 mph. For the power mine has, I'll gladly lose a couple of mpg.

It's things like this that make me think that either I had a bad DPF or my injectors were/are leaking between pulses, causing a rich condition. I do blow smoke on hard take-offs and sometimes when I get on it, but by no means am I rolling coal.

 

[sk123]

There are some "lucky" guys out there driving those what we call frequent regen'ers. :wink2:

 

[LML6600DMAX]

What did you decide OP?

 

[motomatt]

I'm curious what you plan on doing. I'll be deleting mine in November/December once my warranty is up and I'll be in the same boat except I'll have to smog yearly. I was planning on doing the Flo-Pro "race pipes" and draining the piss tank. I already welded a nicer tip over the stock musket (looks better & retains cooling) and I'll probably be keeping the rest of the stock exhaust in place to make it easy to swap.

 

[motomatt]

You're getting about the same mileage as me too. I average around 11-12mpg mixed city/freeway and I just took a road trip from Reno to SLC and back. I averaged 16mpg round trip. I was getting higher until regen kicked in and it dropped about 2mpg when that happened. 16mpg is rediculous when trucks with less technology 10-15 years ago were getting significantly better than that...

 

[rhurley]

What did you decide OP?

You're getting about the same mileage as me too. I average around 11-12mpg mixed city/freeway and I just took a road trip from Reno to SLC and back. I averaged 16mpg round trip. I was getting higher until regen kicked in and it dropped about 2mpg when that happened. 16mpg is rediculous when trucks with less technology 10-15 years ago were getting significantly better than that...

I think I have decided to leave it for the next 6 months.

I am too concerned with draining the pee tank and 2 years later finding 2 grand worth of sensors went bad.

I honestly will delete it, and soon. But I need to do some serious digging before I make up my mind.

Nothing else concerns me other than the def sensors and tank.

 

[LML6600DMAX]

Not a bad idea. Keep us posted on what you end up doing.

 

[rhurley]

Not a bad idea. Keep us posted on what you end up doing.
I'm gonna ride out the 3yr 36k warranty before I delete which will be up by year end. Fortunately as of now I want have to worry about testing.

Yeah I am really not concerned with the warranty. I drive enough the warranty will be up before the given time frame anyway.

I am probably being paranoid. But I heard 2. yes 2. Stories of people trying to put the trucks back to stock and the pee tank, sensors, heater, 9 injector were all bad. One guy had the dealer fix it all and it was like 4800!!!!

I can see how the DEF will ruin it. The stuff dries and Crystalizes so fast, it would really ruin some shit.

 

[John Lee Pettimore]

I don't see why you couldn't drain the tank. Clean it out real good and put it somewhere indoors to keep it in good condition in the event you ever need it again. That's my plan anyways.

 

[LML6600DMAX]

OP not sure if I can post this here but there is an interesting review by Rob from ATP and his long term review of his emissions compliant tunes on the duramaxdiesels forum. http://www.duramaxdiesels.com/forum/showthread.php?t=63908
around page 10-11.
Seems he has had good luck with them just thought it may give you another option or more info.

 

[rhurley]

OP not sure if I can post this here but there is an interesting review by Rob from ATP and his long term review of his emissions compliant tunes on the duramaxdiesels forum. LML mods and dyno testing begins - Duramax Diesels Forum
around page 10-11.
Seems he has had good luck with them just thought it may give you another option or more info.

Did you get the email from ATP too??

hahah. Thank you I have heard but haven't read anything.

Time to do some reading!

 

[LML6600DMAX]

Haha no email. Just been doing research as well to decide what direction I want to take this truck.

 

[PhatMateo]

I live in California and want to do this exact same thing. My warranty is up in August and would love to make the truck more reliable as the only issues i have had with it have been emissions related.

I want to get:

Delete Tunes
Trans tunning
down pipe
full exhaust with Muffler ( or thinking about trying to source an intact stock exhaust and hollow out the dpf, thus keeping the stock look)
Lift Pump
EGR Blocker
Leave the def tank where it is.

Some have mention to just do a race pipe and delete the DPF but I havent seen anyone actually do this on the internets and I would like to get rid of the musket tip anyways.

I feel like it would be easy to swap the exhaust back when needed, tune the truck to stock tune, remove the blocker plate, and put some def in the tank. My fears are similar as above, that when i need to swap back to stock my sensors and stock equipment wont be good and i would need to spend more money to pass inspection.

Disclaimer, if any vendors see this, no need to PM a quote, I have received one already but i am not ready to pull the trigger. Don't want anyone wasting their time.

 

[DirtEmax-USMC]

Interesting to see this thread develop.

Personally.......dont hassle. go full delete or do not.
Run emission tuning or not.

Even if you do everything right with take off and putting back the chance issues will always be present. These emission issues will plague our community until a better design and or a better president comes along lol.

 

[John Lee Pettimore]

Clean the def tank out when you delete so nothing goes bad inside it. I wouldn't bother with the blocker plates unless you just want too. There's plenty of guys with lots of miles that didn't install them.

 

[SilverGorillaLML]

I've been running with no blocker plates for over 40k miles. I didn't want to install them when everything was coming out sooner or later (ended up being later ) I've yet to have mine blow open and have yet to hear or see an lml do it. Not saying someone, somewhere hasnt, but I personally haven't heard or seen it.

 

[Thatmarkguy]

I'm not running blocker plates, I've just got the 3 plugs disconnected. If the EGR did blow open how would I know? It took me 110,000 miles before I deleted so I'm sure I have all sorts of black snot in my intake passages.