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Thread: Enable true TapUp/TapDown on the 2012+ 8th gens with HPTuners Reply to Thread
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  Topic Review (Newest First)
11-06-2015 07:57 AM
F16vipers That's what I figured. They probably don't want to put those kind of options in the 'fleet car'
11-05-2015 10:29 AM
jtrosky No, I definitely don't have any "friends" at the dealership! :-) The problem is that while it may be just a code update, unless the code update has been "released" specifically for the Impala, they won't update anything...

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11-05-2015 10:07 AM
F16vipers I wonder if a dealer could do an 'update'? If it's strictly software they should be able to...not sure if true TUTD requires any different hardware on the transmission's part? JT, do you ever deal with the dealership and have someone you could call and ask? I have never been to/ dealt with them other than when I bought the car. This might be worth looking into if a simple software update would do the trick.
11-02-2015 03:01 PM
jtrosky Very good point. I just check and while the 2012 Camaro and the 2012 Impala both have the exact same ECM "OS ID", the TCM "OS ID" is different - so maybe the TCM OS in the Impala just lacks the capabilities....

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11-02-2015 02:51 PM
F16vipers Both the Camaro and Impala are very similar electronically. Even though they both use the T43 controller...they could be running different software/firmware. I know in the older GM cars the ECM box was pretty much universal...but there was a chip inside that looked like a RAM stick that was the actually 'program' for each model or models of car. I wonder what the variations on the T43 programming is between models? Has anyone ever taken one of these modules apart to see what's inside? This can probably only be answered by a GM tech...I would volunteer...but I don't feel motivated to disassemble my tranny enough to get the TCM out!
11-02-2015 01:46 PM
jtrosky Yes - you are correct - there are gear-up and gear-down buttons on left hand side just like the volume buttons on the right hand side.

Not sure how it's setup on the 9th gens - don't know where their 'paddles' are.

Honestly, you're not missing much. I *never* use the damn things anyway...

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11-02-2015 01:45 PM
ltlar200 someone correct me if im wrong but isnt it like the radio volume buttons on the right side of the wheel just on the left and for the gear select?
11-02-2015 01:22 PM
2007Imp850 Yeah that's what I meant to type, 2012+
Damn that really blows man, they made these cars so much better starting in 2012.
11-02-2015 11:21 AM
jtrosky The 2012+ Impalas all have paddle shifters.

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11-02-2015 10:38 AM
2007Imp850 Wait, the 2014+ Limiteds have paddle shifters too?
11-02-2015 04:26 AM
jtrosky No - nobody has confirmed that this works. The only person that has tried it has been @F16vipers - and without success.

We ere just assuming that it would work since the Impala uses the same engine and transmission controllers (E39/T43), so the "brains" should be there to do it. Also, since the Camaro LS comes the same way as the Impala (using the ERS mode instead of true tap-shift) and it worked for it, we were assuming that it would work for the Impala too.

Obviously, the Camaro is RWD and the Impala is FWD, but I didn't think that would matter since the computer still has the ability to control the gear selection, regardless of whether it's a FWD or RWD transmission. So in theory it appears that everything is there to allow it to work.

But, as we know, theory and reality don't always match up! :-)

I'll also try to test this on mine, just to see if I can get any different results than @F16vipers, but it sounds like this may be a no-go on the Impala for some reason...

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11-01-2015 09:39 PM
F16vipers Has anyone verified that this DOES work with the Impala? Everything I've found is Camaro related.
11-01-2015 05:08 PM
F16vipers According to my display I have PRNDL...when I enable TUTD it won't allow the car to go into 'L' which is the range when the paddles are active. I've tried it with the tap to enable both on and off...I'm thinking our cars might actually be missing the actual programming for true TUTD.
11-01-2015 07:48 AM
jtrosky So you're putting the car in "M"anual mode and the paddle shifters don't do anything at all after you make the changes?? I still haven't tried this myself.

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11-01-2015 03:00 AM
F16vipers I've been trying to get this to work without success...I enabled tutd and zeroed the tables like the camaro guy did...its like it just stays in paddle shift response? Going to play around with it more later this week when I'm off work.
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