yes its true, I am not crazy, after almost 2 months of going to now 5 different Chevy and GMC dealers I finally got the updated calibrations today. I have never been happier to get a computer reflashed. The diesel guy was very cool, even drove an LB7 himself. Anyways, he had an 05 in there next to mine and both were throwing the same codes.. 0401 and 0402 which is EGR. Both trucks had exhaust mods done. The SES light never came on, but after time it would have. Someone here mentioned that a while back. The guy found the updated code and flashed it, no charge, no hassle.

Edit...
Looking at the paperwork mine was actually flashed with the PIP3129B..so that one is the latest.

Findings...
-Surge- since leaving the dealership and driving in 20 miles of bumper to bumper I don't feel it anymore versus before right about 1k rpm's it would "buck"

-Fuel Knock- still has the typical diesel sound, but not as loud on acceleration any more, that is pretty noticable.

-Smoke- was smoking in gear and in park at idle, white smoke. Smell of fuel as well, very strong. Still smokes but not as strong a fuel smell. He said since it was Friday to drive it over the weekend and see if it stops, if it does not then its probably injectors and I would have to leave it there. He said the LB7 they just do a quick test and replace them however on the LLY's since they are different injectors the tests are very extensive. He did say that GM was making new injectors for this problem and will eventually be some sort of recall on them.

-injector Balance Rates- I had at least one injector obviously out of spec and only one other that was borderline. After flash the rates were within specs.

Mechanic also verified that in January they are removing the additive in the diesel fuel and GM is going to recomend Stanadine (sp?) to their customers.

Conclusions...I am happy to finally get this latest calibration, but I fear that I will need at least one or two injectors replaced. These engines are not supposed to smoke and from talking to a friend he was getting smoke and fuel smell and his injectors are being replaced right now. So I will leave the Edge off right now and see how she runs and if the smoke goes away. he said that he has seen others quit smoking after a few days because the fuel is still in the exhaust and finally burns off.

Hope this is good info for anyone and I will keep you posted if the smoke goes away, but I don't think it will.

thanks DP
BrianO.

:ro)

Good info!

So I guess I'll do the dealer crawl until I get one that will reflash mine. I don't know how you guys get to talk to the mechanics. The dealer I went to said no way I was going to talk to anybody except the service writer. They won't even let me go to my truck to get some things I left in it that I really could use this weekend. It was only supposed to be there for the day and now they're saying I should get it back Monday. It's been in since Tuesday morning for the intercooler leak. Also they will not reflash my truck. I'm going through serious withdrawls.

Sorry but I'm in the venting mode. Good info. Thanks for sharing.

First off...if they don't let you go to your truck its against the law basically....you own it....I am just gonna stop here....get your truck out of there NOW!

I agree...that is just crazy. I usually will stay just outside the doors while they work on any vehicle of mine just because I have had things stolen in the past. This particular time he said I coudl come in and while my truck was being reflashed he was wroking on an 05 and we talked while he worked. Depends on the people I guess, but if I were you I would find another dealer if you can. dpower is right, they can't stop you from going to your own vehicle. I would be very leary of that place doing work on my vehicle.

They keep siting liability issues when I ask them if I can go see my truck. I'm going to search for the part myself at another dealer. If they have on I'll buy it and take it to the one my truck is at and tell them to put it on and get the hell out of there. I was going to make them detail the truck when they were done but now I'm thinking that would take another week.

lakingslayer...I understand the liability reasons if you were to walk through the shop while they were working or something, but if you want to go to your own truck no matter where it is to get something.. thay can't stop you. I usually don't go in, but my truck is always in my site at all times. This guy was just cool and didn't mind me standing there.

good luck with the search, hope it works out for you

Yeah, what Briano said! :ro) I watch every evolution that takes place on my truck, mostly to ensure the work is done correctly. Just walk around the building and park yourself right outside the bay where your truck is being worked on, never had a problem. The techs are usually pretty cool and understand someone wanting to watch any work being done on a $40k+ truck.

GM dealers are a strange breed. I took 5 gallons of Transynd, a new filter and deep pan to one dealer who promptly told me it would void my warranty and they refused to do the work. So I went across town to another dealership who promptly installed everything. GM should do a better job of educating their dealerships on what is/isn't acceptable for these trucks.

I'm taking the LLY in Friday to have some work done and have requested the reflash. The dealership I purchased at isn't very high tech so we'll see if I'm successful at getting it done. Later. JJ :)

So I guess I'll do the dealer crawl until I get one that will reflash mine. I don't know how you guys get to talk to the mechanics.


I basically just called the main number, asked for the shop, then asked for the diesel mechanic and that I had forgotten his name.. put me right through.

Also, as most can tell you if they have kept up with my saga that its not been easy for me, I have the actual PIP form printed out and took it to each dealer. I explained the symptoms and then showed them the printout. A few of them told me right to my face that I had the latest updates and that there was no such thing as the PIP number I showed them.

I know now they were all lying to me (or really had no clue). This guy yesterday let me watch every step of the way. He brings the TechII computer to your truck, hooks it up, it downloads the versions that you currently have. then he takes that back to the main system, not sure of the name, then it compares what you have to what is in the system. there is a point that it comes to that if no updates are available it will stop.. surprisingly he said, "looks like there is an update".. I was like "WHAT?".. wow, so I am not crazy. I looked on the screen and sure enough the number was 3129 which only emphasized that I was right. He did it at no charge and it did fix the balance rates of the injectors, but of course by now I probaby have a few bad ones.

if your truck was purchased before September, like me.. then you do not have the update despite what these fools told me.

Went in today, Saturday to have the service manager tell me he was to "Busy" as they were all sitting there staring at the clock. Left and drove directly to the shop and went in and asked someone, jus being as polite and acting clueless as ever. The tech walked out said no prob, i showed him the info that i had printed out from this site , got the tech 2, flashed it, i soon returned with an 18 pack for him and his compadres and was off, happy!! Never hurts to go right to the source !! lol:ro)

sweet!!

Thanks for the support guys. I'm not sure at this point if I want to press the issue with the reflash or just try another dealer. I had a good relationship with another dealer when I had my 1500. They don't have a diesel mechanic so they referred me to one that did which is the one I currently am having this issue with. I may take it back to the previous dealer and have them reflash it. They probably will. I'll bring a copy of the TSB.

5thgeartapped-I would have no problem providing a little refreshment to the mechanics as long as they are competent. I wish I could talk to this mechanic and get his story. If he reflashed my truck for me I'd buy him a couple of cases of whatever he wanted.

Well i didnt provide refreshment till AFTER the work was complete:D Hopefully yours or any others vehicles on this site were not attended to after that!!!
Maybe just going to have to get pushy.. File a customer complaint. The whole process took 10 minutes, guess I just got lucky... Good luck

I think the problem is California. I'll bet if you did an informal poll, the guys that cannot access their vehicles once they're in the service bays are in the Golden State, thanks to our litgation-mad approach to anything. If I didn't have family here, I think I'd be in Montana or somewhere else where if a lawyer or two disappeared, nobody would care. ;)

Briano .. Thanks for posting your results. I am glad to hear balance rates are fixed after the reflash. It will be interesting to find out if the flash resolves you Edge knocking sounds.

I think the problem is California. I'll bet if you did an informal poll, the guys that cannot access their vehicles once they're in the service bays are in the Golden State, thanks to our litgation-mad approach to anything. If I didn't have family here, I think I'd be in Montana or somewhere else where if a lawyer or two disappeared, nobody would care. ;)
Guess I screwed up. I moved from Montana to California with a short stint in AZ. What was I thinking? I guess I was tired of the cold.:rolleyes:

Guess I screwed up. I moved from Montana to California with a short stint in AZ. What was I thinking? I guess I was tired of the cold.:rolleyes:
I've heard the snow *does* get old and hell, if you can afford San Diego these days, why not! I'm pretty sure the bikini ratio in San Diego still outweighs that in Montanna during the summer. :p

I'm pretty sure the bikini ratio in San Diego still outweighs that in Montanna during the summer. :p
:D

My truck is still working great. I don't get the mileage I'd like though. Should I get the updates? I have not taken my truck back to the dealer for anything yet. Almost 15K miles so far. 2 oil changes done myself (3rd one due soon). I would like to get it re-flashed for 265 tires. I'm running 285's but will go back to 245's or 265's if I can get a reflash for it. I don't think the dealer will touch the truck for any driveline work if I'm running anything bigger than stock tires.
The 285's change the gearing a bit too much for my tastes anyway. I'm wearin' 'em out quick with the Edge though.


Gar

Gar,

from what I have heard and read, they cannot change the programming for bigger tires. If you do a search for tires or related you will see plenty of threads with that exact topic. I sold my stock wheels and tires so I am screwed in that manner.


good luck

Drove mine today for a while and discovered a much better running truck, no more motor knock and maybe just me, but my EGT's and engine temp were signifigantly cooler, compared to the same driving yesterday before the flash ?? hmmm!

I don't trust my dealer either. They do great work on the Pontiacs, but there's a lot of head scratching when they peer into the engine compartment of my GMC LLY. I found a diesel shop, Midwest Injector, and he flashed my computer for free. He has the same up to date info as any dealer. He also sells Stanadyne fuel additives, which comes in handy, and sells them at web prices. I had the surge problem, but no smoking. Flashing corrected it immediately.

2004 Sierra ext cab short box 4X2.

I talked to the service writer. Guess what? I get my truck back today. Of course not a damned thing was done to it. They lied to me. They said it wasn't driveable because the part (clip) they were waiting for was broken off when they took the intercooler hoses off. I guess they called GM today and GM said unless it is leaking bad they weren't supposed to fix it. I asked him "So it is supposed to leak oil on my driveway?". He said no and they would do the TSB (which they acutally got the info on from GM today and wouldn't take my word and/or number of the TSB for it) on my truck when the parts came in. Socaldieseltech said he would have handled it by looking at the truck and ordering parts and let me drive it until the parts showed up. Then make an appt. to have the new parts installed. Gee that's what they are going to do now after a weeks waiting without my truck. What a bunch of Censored Censored Censored Censored Censored Censored Censored Censored :mad: :mad: :mad: :mad: . I think I'm going to handcuff my arms and leggs so I won't kick their Censored 's. I'm actually a very mellow person. My girlfriend said she's never seen me this mad. I've been with her for seven years.

My GMC dealer did the flash while my truck was in for a leaking axel seal. I did not ask for the flash, they just did it. Yes, its a little smoother, but it lost noticeable power towing and unloaded at full throttle. 5thgeartapped said cooler egt's, he's right, less fuel (and power), less heat. I am going after GM to put the old program back in (dealer said no way). If you are towing a big rig like my 12,000 pound 5er, don't do it. I'm not happy with it.

Has anyone done a before reflash and after reflash dyno on these yet?

Well I am taking mine back tomorrow to the dealer. the smoke and smell of fuel has not changed so its more than likely injectors. I am trying to find out if they have them in stock or not to save me a trip down there. I want to get this done before the holidays.

As for the old code...I do'nt think you can back rev, only one direction, up.

Third dealer I went to just called (I dropped it off with the TSB this am) they did the reflash! Will re-install juice and post back (only reason I wanted it reflashed was the juice knock) truck runs perfect without the juice. Funny thing is the first dealer I went to like two months ago is still waiting on a new EGR valve to come in! And I run a blocker plate! LOL! All I wanted was the reflash!

I went to the dealer today (after removing my blocker plate--- waiting to get finger stick) to see about getting the new reflash. He ask if it has throw any lights and I said no. They will not install the flash unless they have a good reason and the right codes. The only problems I told them I knew about was surging and the transmission draining down and I would have to wait to engage gear after startup. I will be pulling a big trailer (#11,000+) in a couple of weeks for a vacation in Florida, so it might be better that I didn't get the reflash like "Robsauto2" just said.

Hooked juice back up, and so far no knocking, will have to drive it some more to make sure, but so far so good.

Noticed the same thing. Juice knock is gone. I jus hid my Attitude in the fuse box and left it all hooked up. Have you noticed lower EGT's Or overall temp?

50 mile drive to work this am, no knock! I don't have the attitude hooked up yet, so no EGT's yet, engine temp seems the same. I was going to sell the juice if the reflash did not work--happy so far!

I took the leap myself last week and had my truck reflashed. :rolleyes: Performs like a different truck, smoother throughout the entire rpm range, could swear the allison learned something as well. The truck has never performed so well.

I was concerned about losing power for towing my 5ver. The truck seems to get the power/torque to the wheels better than before, mpg's are up as well. No complaints from JJ so far! Happy Holidays! JJ :)

very cool JJ.. I said this in another post, but I can tell a difference as well. drives and shifts much smoother than before.

happy holidays everyone

and I will say that I see a bit better performance but not too dramatic of a change:) . The most notable thing was that the turbo whistle was more pronounced which is totally cool with me:cool: .

Update 4 weeks after reflash. Truck still runs smooth, no low idle surge, towed the 5ver and it feels like I have a tow tune. My LLY just seems to get the power to the wheels better after reflash. Oh yeah, before the reflash I could never get mine to blow smoke like others talk about. The other night I needed to merge into traffic (more like butt in ):h ) and I punched it, nice ball of smoke back there, and I was flying! I have no idea what the benefit of the smoke is, but it finally did it.

Master44, I to have noticed the turbo spooling up faster! Love that sound. I'm finding it fun to drive around town in t/h, the LLY does a better job of braking in t/h.

Just ordered the EJ/A and Trippin's ATS mount, wwweeehhhaaa! JJ :)

Has anyone left their juice all hooked up when they went in for the flash? The mechanic at my dealer is really cool, and doesn't seem to have a problem with mods. They havent seen my truck yet, but I can only imagine when I take it in, not even 4k on the odemeter yet and already have scared the warrenty right out of er. ):h This town is not use to trucks like mine, I know I have the only lifted Dmax, and definitly the only LLY with fully modified exaust.):h

Update, truck is still runnin great after reflash. I do not notice any loss of power, but with the juice in normal drivin mode (level 3) I do notice less smoke when I hammer her. I do have pre reflash G-tech numbers, will run G-tech after reflash and post back. With the blocker plate, finger stick, and juice, I am finally happy with my truck, but still want to do the exhaust and lose Kitty--saving funds for exhuast--will be soon!

Has anyone left their juice all hooked up when they went in for the flash? The mechanic at my dealer is really cool, and doesn't seem to have a problem with mods. They havent seen my truck yet, but I can only imagine when I take it in, not even 4k on the odemeter yet and already have scared the warrenty right out of er. ):h This town is not use to trucks like mine, I know I have the only lifted Dmax, and definitly the only LLY with fully modified exaust.):h

Mine is at the dealer now with the edge on it. They are cool with the aftermarket stuff. They are also much more upfront with letting me know what is wrong with my truck and whether I can drive it or not until they get parts. This is the total opposite treatment compared to the last dealer I took it to.