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Tuning / Diagnostics -- engine and transmission Tune and diagnostics for engines and auto transmission.

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Old 07-14-2012, 10:06 AM   #1
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S mode tuned into 2LS by GM?

As the title says do yall think it is possible for me to take my car to the dealer and have them put the stock tune from say a 2LT so that I have S mode? I want this so that when I tune my car for my supercharger I can have them aggresively tune S mode and leave D mode a little less aggressive. I am not very good with tuning things so I am not sure this will even work.
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Old 07-14-2012, 11:17 AM   #2
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We don't have S mode?
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Old 07-14-2012, 11:20 AM   #3
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The 2012 2LS doesn't. For some reason they took it out. That is why I think that it could be tuned back in. All it would take is the stock tune from a 2LT....I think.
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Old 07-14-2012, 12:42 PM   #4
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Nope, they won't do it.
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Old 07-14-2012, 12:45 PM   #5
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Yeah I called today and both places I called told me that I would have to get approval from the service manager to have it done and would have to get approval from GM regional after that to have it maintain under warranty. I think I am going to pursue it. I see not reason why it would hurt anything. I mean if they did it for the 2010 and 2011 and they have it on every other model of 2012 why can't they do it for mine? Ill let you know what I find out.
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Old 07-14-2012, 01:03 PM   #6
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The reason it doesn't have it is for them to be able to achieve the mpg that they advertise. Same reason you don't have the gear ratio a 1lt has. You could probably get it done but under warranty who knows. Good luck though
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Old 07-14-2012, 03:50 PM   #7
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Right but what they should have done is the MPG tune into the "D" and then havbe an "S" mode. I just dont understand why they did that.
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Old 07-16-2012, 03:15 AM   #8
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I don't think its possible to program d and s independently of each other for a lot of things. I could be wrong but that could be it
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Old 07-16-2012, 08:22 AM   #9
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If I'm not mistaken the LS tranny has different gearing ratios compared to the LT which is why it doesn't have it.
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Old 07-16-2012, 10:14 AM   #10
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No the only difference is the gears in the differential are 2.92 instead of 3.23.
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Old 07-16-2012, 10:16 AM   #11
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I will probably just wait until I get my new gears and then get the Trans and engine tuned. Then retune it for my supercharger. I was mostly just curious if it was possible.
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Old 07-16-2012, 12:10 PM   #12
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Quote:
Originally Posted by lscamaro View Post
I don't think its possible to program d and s independently of each other for a lot of things. I could be wrong but that could be it
I have a 2011 2LT and it can be tuned for each mode. I have D set a little bit more aggressive than stock and S mode tuned to be a True Sport mode. From what I was told before the tune is each mode uses its own tables.
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Old 07-16-2012, 12:54 PM   #13
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Yes, what your speaking about is shift firmness and torque management which can be tuned independently of mode. But the op is suggesting that gm should have put an mpg tune into d and a sport mode in s. That can't be done. The tune applies to both modes and you can't have one tune for d and another for s. I've asked Vince about it already and he said he couldn't do it because the code didn't allow for it. This might have changed since I asked but that's what he responded to me
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Old 07-16-2012, 01:19 PM   #14
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The only thing that changes between modes is shift points (MPH/RPM) and shift pressure.

Torque management, engine criteria (AF ratios, timing, etc) are all the same. OP, you are totally wasting your time (and money?) by doing this, also, they may not even be able to do it, they are different operating systems and they are actually totally different ECUs. 10-11 have Bosch ECUs while the 12's do not. Totally different code, OS, etc.
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Old 07-16-2012, 02:18 PM   #15
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I understand that the 2011 and 2012 have different ECUs. What I am saying is take the tune from a 2012 2lt and put it in a 2012 2ls giving it an s mode.
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Old 07-16-2012, 02:48 PM   #16
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Quote:
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I understand that the 2011 and 2012 have different ECUs. What I am saying is take the tune from a 2012 2lt and put it in a 2012 2ls giving it an s mode.
Oh ok. Well even so, you may not be able to, depends on if the TCM supports the OS. I have not tuned a V6 yet since 10/11 are out right now and 12s are new so.... I guess all you can do is try.

With that said, you will probably need a tuner to do this for you, not the dealer.
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Old 07-16-2012, 05:42 PM   #17
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Yeah. Reason I was thinking the dealer is becuase all I want right now is the STOCK tune from a 2LT and if I could get a dealer to do it I could keep my warranty. It would just be like they were reflashing a stock 2LT but it would be my 2LS instead.
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Old 07-16-2012, 05:45 PM   #18
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Will shut off other things, it is VIN specific, so communication will be a problem between controllers.
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Old 07-17-2012, 12:25 PM   #19
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Quote:
Originally Posted by usnatclee View Post
Yeah. Reason I was thinking the dealer is becuase all I want right now is the STOCK tune from a 2LT and if I could get a dealer to do it I could keep my warranty. It would just be like they were reflashing a stock 2LT but it would be my 2LS instead.
the ecm and other modules dont care what the trans vin# is.


that would work but you would still need tuning software for the trans to adjust your shift points and rpm back to your original settings because the final gear ratio is different between the 2 models, find someone with obd2 tunercats, i have this and i can re-program the trans module seperate from any other module
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Old 07-17-2012, 12:53 PM   #20
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The only factory tune alteration I've ever heard of is for an optional available accessory wheel size. Like if you bought a truck with 19's and they had accessory 20's available, they would also have the 20" calibration available. Never heard of using a different model calibration, highly doubt it would work.
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Old 07-17-2012, 05:02 PM   #21
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The new Global Architecture electrical systems do not allow controller swaps between vehicles. Swapping ECM’s or other modules (including Radio, BCM, EBCM, SDM, TCM, ECC (HVAC), EPS, HPCM, VCIM & IPC) on vehicles with the new Global Architecture electrical system will result in damaging both controllers (A NO START CONDITION WILL OCCUR ON BOTH VEHICLES IF THESE MODULES ARE SWAPPED) due to the new vehicle security code protocol (environment) starting with the 2010 MY GDS applications.
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Old 07-17-2012, 06:42 PM   #22
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I called 6 dealers and none would do it (under warranty). Oh well. Ill just wait and tune my stuff when I get my supercharger. Thanks for the input yall.
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Old 07-20-2012, 02:47 PM   #23
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No the only difference is the gears in the differential are 2.92 instead of 3.23.
If the cars have different rear gears, then there is most likely no factory calibration available for the 2.92 car with S mode. Dealers can't make their own tunes, they can only flash in what's available from the factory. The gear ratio affects shift points and converter lockup points as well as speedometer calibration. Flashing in a calibration from a 3.23 car will result in the speedo working incorrect, and less than optimal shifts, as well as possible problems not shifting at full throttle.
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Old 07-20-2012, 04:03 PM   #24
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We can tune D independently of S and make the car shift differently in S vs D.

And we've been toying with the idea of D being an economy mode and S being power mode. We would do it if there were a lot of interest in it. I don't know how much more MPG we could get out of it, but there's gotta be something on the table.

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Old 07-20-2012, 08:34 PM   #25
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We can tune D independently of S and make the car shift differently in S vs D.

And we've been toying with the idea of D being an economy mode and S being power mode. We would do it if there were a lot of interest in it. I don't know how much more MPG we could get out of it, but there's gotta be something on the table.
I tried the eco mode from Vince months ago. In my opinion it was crap. Huge deadspots in the throttle and real fast shifts. I understand getting to 6th and doing it easy is the way to get better MPG,but the tune wasn't for me. Maybe others would like it though,but I doubt it.
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