(Klaus?) After an "updated programming", some 03s and 04s get 13.5MPG?

[DavidAragon]

... so what is the verdict? All I have to do is take it in to the dealer and ask them to re-program it?

I got info to come up for mine on the GM site and it gives me a bunch of items; from powertrain to radio to body control module... do I have to ask for each one or just ask them to update everything?

Thanks,
David

[H2Chuck]

ok I called my dealer and he said he could do it now ,,so I am going to have the firmware for the engine done and see if it makes a difference ..wish me luck ..i should be back to post the results if anyone is interested ,,parring nothing blows up..lol..

[mmayo]

website is http://westers_garage.eidnet.org/

1-888-WESTER1

His name is Lyndon Wester, extremely nice guy. Tell him Michael Mayo sent you.

Tim, you don't have to take it out for warranty work, there is no way for them to detect it. He puts the latest GM updates on the PCMs, so if they look at it they leave it alone. If they happen to update it for any reason, he'll send you a new one and you ship yours back to him.

[NV Hunter]

Albie, I've been reading about this updated programming and saw that you checked in Vegas with no luck. I just called Towbin Hummer and asked about the updated programming. He said to just bring mine in for the next service and they will run the new programming.

[Albie]

OK I called my Two Dealers, one in Pasadena and one in Vegas. Both of them had not clue on what I was talking about. So who should I go to in LA

[PARAGON]

Ok, got my truck back and here is what was updated:<UL TYPE=SQUARE><LI>reprogrammed air suspension module with new cal # 15233125 & 15233124
<LI>reprogrammed HVAC module with new cal # 1505218, 15105971, 15105970
<LI>reprogrammed PCM with updated cal # 12593058, 12592278, 12592279, 12592280
<LI>Optima battery had bad cell replaced with customer supplied battery[/list]

[Marcmedic]

Had my computer updated a week ago. Was getting 10.8 mpg and now getting 11.0. Pretty much the same route and driving.

[dochummer]

So I spoke with the local gm service and asked them if they could do the upgrades to the firmware. They said that they were equipped to do it, but I would have to let them know what the problems are that I'm experiencing. He said that they wouldn't just throw in the updates without verifying some type of problem. He said that they have to enter info into their computer, and it would spit out the solution.. So....all I want is to see if my mpg's will increase with the upgrades. What should I say to the guy?

[tourtek]

Yeah, that's what it said. I can't remember whether is was a "writing" or "script" error, as I was too busy trying to figure out how get out of the situation at that point! In all honesty am not blaming the programer though, as I have used this thing succesfully for almost a year, and have loaded various custom tunes with it and generally monkeyed around with different advanced settings, and have also gone back to stock to make comparisons on a few occasions. The stock tune had been succesfully re-installed in the computer, prior to the dealer making the changes. I had a gut feeling this might cause a problem, and now wish I'd checked with someone at Diablosport prior to trying to re-install the Predator tune. I think since the Predator tuner permanantly stores your original stock program data, that it saw a different/new program in the computer and locked up. I had a Jett chip I bought when I first bought the vehicle and put that back in last night, with no ill effects. I'm gonna live with it and call it good.I'm going to try and get the Predator re-set but probably won't use it again. They charge $75 for this, and I'll more than likely offer it on this forum, cheap, if I decide to have it done.

[H2Chuck]

Sorry for taking so long to get back.I had to work a day or 2 .Seems as tho the DIC is correct.
14.3 1st time and second fill up i checked it was 14.4..but i do try and keep foot out of it ..

[H2Chuck]

Hey after you have checked this update out and verified that it works ,,tell me what i need to do to get this done to my 03 H2..would be very interested in knowing results ..
Thanks
Chuck

[GasGuzzler]

Hi all

Klaus's link works. Our H2's missing firmware update is attached. I believe what I am most interested in is:

12593058 NEW SOFTWARE TO ADDRESS IDLE SURGE CONDITION CAUSED BY THROTTLE BODY COKING.

Thanks, Klaus! I am taking our H2 in tomorrow morning.

[tourtek]

Ok, here's a question? Since my computer was "cooked" and replaced, should I assume that these latest upgrades were installed when they did the re-flash/re-program on the new one? I was told that when they re-flash a computer that the information is downloaded straight from GM into the PCM/VCM, so all the latest patches should be included? The part number on the programing is
12582605. Is their anyway to look this up and find out if it includes the latest upgrades.I'm not so sure they didn't just put in the old program that they might have previously saved somewhere?

[H2Finally]

Mine are at 44psi -- ride is excellent, and in my experience, I can take the corners at highest speed at this psi (I live in a hilly area).

My updated programming did NOT improve mpg whatsoever. 10.9 from the beginning, 10.9 now at 12,000 miles (in only 7 months!! ). Then again, I think I got the improved throttle response programming earlier than anyone here. So the improved mpg programming could be available more recently. Hmm.. gotta ask next oil change.

[mmayo]

I sent mine back to him after I installed the one he tuned. Once you put the tuned one in you'll never want to put your old one back in!!!

[DURAMAX TIM]

Thanks for the info, I'll have to see about getting one.
Did u buy another ecm or send yours in?

I've got a juice/attitude coming Wednesday so I can play now, the LLY took a little while.

[C5A4]

I emailed Diablosport asking about the upgrades in the programing and this is the reply.

QUESTION: [I have a Predator for my 03 Hummer H2. Hummer has just released a couple new software updates for the engine. If I upload my factory program back in and then take it in for service at my dealer once they update the trucks software will my Predator redownload the new updated software then install the performance tune?]

------------------------------------------------------------

ANSWER:

We are aware of these new flashes and if you used the predator it would install the older revision, we are currently working on a upgrade in revision to accomodate this.
johan@diablosport.com

Thank you for your interest in DiabloSport!
Stay tuned,
Johan, a proud member of the DiabloSport Support Team

[Nitrobooger]

I just had mine reprogramed today. I will post up any noticeable differences later. Shifting seems better but, it could be just me. I had the Hypertech on before.......

[Klaus]

Here's a good link to GM's site where you can see all the firmware updates available:

http://calid.gm.com/vci/VINEntryPre.do

[demj1308]

anyone having problems with gm vehicle calibration site ?, all i get is "getting calibration info"