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Here's my experience with the GDE tune:

Once the active regen message shows in my EVIC display (the message says the filter is 80% full) and if I'm not traveling at freeway speeds I try to keep the engine between 1,500 & 2,000 rpm by manually shifting gears. Once the regen message shows that the filter is 70% full I know that the active regen has begun. I've found that at this point I can drive at whatever speed I want and the regen will finish. I can also park it at this point, the truck will cool itself while parked, and the regen will start again when the filter is again 80% full.

(This morning I completed my regen at idle)
 

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My truck did a regen at 700 miles or so, and by 1,200 the filter was full and it went into limp mode so I limped it to the dealer. They did a software update and a regen. Since then if I do all town driving, which involves a lot of shorter trips up to 5 or 10 miles at the most, and many only 1 or 2 miles, it will regen every 50 to 75 miles. Incredibly frustrating. If I had known that this truck cannot operate strictly as a city truck, I would never have bought it.

The biggest annoyance is that I will start the truck, with no prior warnings the info screen will say "filter 70% full, drive at highway speed to remedy" and then within a minute or two it's at 90%, and I'm forced to drive 8 miles out and back into town for it to regenerate. Not exactly convenient. The dealer says this is normal with the ecodiesels. It's the only thing that I dislike about the truck. The time it went limp I had less than 2 miles from initial warning to limp mode.
My 2016 has 33,000 Kilometres in the last 12 weeks mostly in the city I have never seen a re-gen message at all and I don't really care what's happening under the hood as I just drive it I have no tuner I have no problems

And if I do have a regen going on I sure as hell wouldn't go out of my way to finish it it will finish it when I get back in the truck

Is not going to burn up on you
 

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lookaught:
I know exactly how you feel. For my opinion and further information you can check out the thread I started "excessive REGENERATIONS". in the mechanical section. Where are you located (province / state)?

I have considered trading for a hemi but instead of loosing money going that way I am now also thinking about the GDE tune. I too like the truck in every way except for the frustrating, annoying frequency of the regenerations. I too wouldn't have bought the ED if I had known they would occur this frequently.
I ended up getting the GDE tune about a month ago and have yet to see a regen since.

I'm located in Wyoming at about 5,400' elevation. Most of my driving is either short trips in town of a mile to two, or trips up the canyon to ride mtn bikes that are about 10 miles each way.
 

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My 2016 has 33,000 Kilometres in the last 12 weeks mostly in the city I have never seen a re-gen message at all and I don't really care what's happening under the hood as I just drive it I have no tuner I have no problems

And if I do have a regen going on I sure as hell wouldn't go out of my way to finish it it will finish it when I get back in the truck

Is not going to burn up on you
I was not worried about some catestrophic failure, but the truck did go into limp mode and sort of strand me when the filter hit 100% full and it would not regenerate. That's what I am worried about because only the dealer can do the forced regeneration (or at least I can't).

Hopefully the GDE tune sorted it out, it's been running well since and improved MPG.
 

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I have only seen 1 regen in 67000km happened around 64K, 90% of my driving is highway no mods all stock

Sent from my Z30 using Tapatalk
It is very possible that you have only seen one regeneration, but the reality is that you have likely had over a hundred regenerations.
 

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10,000 miles and no regen yet , 70 miles to work 2 days a week and towing a light trailer , did go into limp mode when oil got hot towing 3000lbs over Vail pass and the tunnel 8% grade ,
 

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10,000 miles and no regen yet , 70 miles to work 2 days a week and towing a light trailer , did go into limp mode when oil got hot towing 3000lbs over Vail pass and the tunnel 8% grade ,
I'm going to guess you had at least 50 regens in 10K miles if you have the stock tune. If you have the GDE tune, you probably had a dozen or so regens.
 

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I am looking into the GDE, so my question is how does the GDE tune limit regens? Does it truly make the motor burn that much cleaner or sometime down the road are we going to be in trouble because the GDE tune did not allow the truck to clean its emissions equipment. That is my concern; I'm confident that the answer is going to be, yes it is that much cleaner, but I would like to know how in some detail so I can put my mind at ease. I would really like to purchase it, but like many, I bought the diesel to last and I don't want to put the GDE in it if it is actually going to make the longevity less.

Thanks all
 

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I am looking into the GDE, so my question is how does the GDE tune limit regens? Does it truly make the motor burn that much cleaner or sometime down the road are we going to be in trouble because the GDE tune did not allow the truck to clean its emissions equipment. That is my concern; I'm confident that the answer is going to be, yes it is that much cleaner, but I would like to know how in some detail so I can put my mind at ease. I would really like to purchase it, but like many, I bought the diesel to last and I don't want to put the GDE in it if it is actually going to make the longevity less.

Thanks all
Yes the GDE produces much less soot than stock. It also changes the initial regen trigger from 65% to 80%.
 

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What is the benefit of moving the regen from 65% to 80%?
To reduce the number of regen cycles. The fact that GDE tune burns cleaner, it takes a lot longer for the DPF to load up, there is more time for the truck to go through the regen process before the DPF is full. It rough comparison, the stock tune would probably have to regen once(probably twice) in the amount of miles the GDE tune would cover with the DPF going from 65% to 80%.
Less regeneration cycles is easier on the exhaust system and engine.
 

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I'm getting my bonus at work next month and think I know what I am going to spend it on :)

As a side note, I was on the Colorado Diesel forum and this forum is much more informative about our truck, so kudos
 

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I now have 1500 miles on my truck, I just saw for the first time: "Exhaust Filter 80% Full Safely Drive at Highway Speeds to Remedy". Shortly after it changed to: "Exhaust System — Regeneration In Process Exhaust Filter 80% Full". After driving about 15-20 more minutes in-town (not really highways) it went away. I have frequent and short in-city 5-10 minute trips on a daily basis.
 

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I now have 1500 miles on my truck, I just saw for the first time: "Exhaust Filter 80% Full Safely Drive at Highway Speeds to Remedy". Shortly after it changed to: "Exhaust System — Regeneration In Process Exhaust Filter 80% Full". After driving about 15-20 more minutes in-town (not really highways) it went away. I have frequent and short in-city 5-10 minute trips on a daily basis.
Your truck with your type of driving and stock tune is doing a regen about every 100-125 miles at the 65% mark (assuming the previous regen completed normally). If it doesn't complete it will continue to fill until you get the message as you did notifying you to drive and clean it out.
 

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lookaught:
I know exactly how you feel. For my opinion and further information you can check out the thread I started "excessive REGENERATIONS". in the mechanical section. Where are you located (province / state)?

I have considered trading for a hemi but instead of loosing money going that way I am now also thinking about the GDE tune. I too like the truck in every way except for the frustrating, annoying frequency of the regenerations. I too wouldn't have bought the ED if I had known they would occur this frequently.
Just had GDE installed this week (and it's great) and just had my first regen at 818 miles, can't beat it.
 

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97 hmcs Thanks so much for this post.

My 2015 Laramie ED has 15,000 miles on it. I am, in fact taking it in today for the 15,000 mi service (fuel filter). This morning I got the first notification I have ever seen regarding regeneration. It instructed me to drive at highway speeds and that my filter was at 80% capacity. I have been driving around town for a few weeks and have not really been out on the road much. I simply got on a local parkway and drove at 65 to 70 for about 25 minutes. Beautifu morning and perfect for a little drive. The notification of 80% capacity progressively reduced in 10% increments until I got the regeneration completed message. All seems well in my world. Truck ran and runs great, only issue I ever had was a faulty sensor. Interesting story! it happened on a long trip, I went to a Ram dealer a couple of states away and explained the situation. They did not have the sensor in stock, but believe it or not, took one out of a new truck and put it in mine, and then sent me on my way with a smile. Back at my own dealer, after I returned, they gave me a flash and said I was good to go. Pretty amazing service IMO. After my experience this morning I was actually in the process of posting a regeneration question when I saw your post. You answered every question I had. Thanks again. and Happy Driving.

Grace and Peace
 

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Not sure if anyone said this already - forgive the repeat.

Holding all else constant - meaning if you did nothing else but change this parameter in the ECM -

By moving the regen cycle to 80 instead of 65, you extend the range between regens you actually save fuel used in regens. A lot of the fuel used in a regen is getting the DPF up to temperature. this way, you regen only @ 80pct and spend a little extra fuel burning off the increased amount of soot rather than expending larger amounts to heat the DPF more often.

make sense?


Think of it like a tea kettle...

If you only fill the kettle half full, heat it, use all the water, then refill to half again, you use more fuel then heating a full kettle once and just maintaining the temp. The amount of energy used to heat the water itself is the same, but you incur less loss in heating the kettle over and over... it requires less energy to maintain the temp than heat it from the start.
 

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Your truck with your type of driving and stock tune is doing a regen about every 100-125 miles at the 65% mark (assuming the previous regen completed normally). If it doesn't complete it will continue to fill until you get the message as you did notifying you to drive and clean it out.
Not true of my truck... I drive short trips and have frequent regens, which I occasionally monitor. If I shut down during a regen, it just takes less time before another regen starts. Mine seldom gets down to the 8% regen completed, but I have never had the EVIC message to drive on the freeway. This truck is very forgiving of incomplete regens, by my experience.
 
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